A Fast and Easy to use microframework for the web.

Last update: Jan 4, 2023

Overview

A Fast and Easy to use microframework for the web.

Description

Crow is a C++ microframework for running web services. It uses routing similar to Python's Flask which makes it easy to use. It is also extremely fast, beating multiple existing C++ frameworks as well as non C++ frameworks.

Features

Easy Routing (similar to flask).
Type-safe Handlers.
Blazingly fast (see this benchmark and this benchmark).
Built in JSON support.
Mustache based templating library (crow::mustache).
Header only library (single header file available).
Middleware support for extensions.
HTTP/1.1 and Websocket support.
Multi-part request and response support.
Uses modern C++ (11/14)

Still in development

HTTP/2 support

Documentation

Available here.

Examples

Hello World

#define CROW_MAIN
#include "crow.h"

int main()
{
    crow::SimpleApp app;

    CROW_ROUTE(app, "/")([](){
        return "Hello world";
    });

    app.port(18080).multithreaded().run();
}

JSON Response

CROW_ROUTE(app, "/json")
([]{
    crow::json::wvalue x({{"message", "Hello, World!"}});
    x["message2"] = "Hello, World.. Again!";
    return x;
});

Arguments

CROW_ROUTE(app,"/hello/<int>")
([](int count){
    if (count > 100)
        return crow::response(400);
    std::ostringstream os;
    os << count << " bottles of beer!";
    return crow::response(os.str());
});

Handler arguments type check at compile time

// Compile error with message "Handler type is mismatched with URL paramters"
CROW_ROUTE(app,"/another/<int>")
([](int a, int b){
    return crow::response(500);
});

Handling JSON Requests

CROW_ROUTE(app, "/add_json")
.methods("POST"_method)
([](const crow::request& req){
    auto x = crow::json::load(req.body);
    if (!x)
        return crow::response(400);
    int sum = x["a"].i()+x["b"].i();
    std::ostringstream os;
    os << sum;
    return crow::response{os.str()};
});

More examples can be found here.

Setting Up / Building

Available here.

Disclaimer

CrowCpp/Crow is a project based on ipkn/crow. Neither CrowCpp, it's members, or this project have been associated with, or endorsed or supported by ipkn (Jaeseung Ha) in any way. We do use ipkn/crow's source code under the BSD-3 clause license and sometimes refer to the public comments available on the github repository. But we do not in any way claim to be associated with or in contact with ipkn (Jaeseung Ha) regarding CrowCpp or CrowCpp/Crow

Attributions

Crow has incorporated the following libraries into its source.

http-parser (used for converting http strings to crow::request objects)

https://github.com/nodejs/http-parser

http_parser.c is based on src/http/ngx_http_parse.c from NGINX copyright
Igor Sysoev.

Additional changes are licensed under the same terms as NGINX and
copyright Joyent, Inc. and other Node contributors. All rights reserved.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to
deal in the Software without restriction, including without limitation the
rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
IN THE SOFTWARE. 


qs_parse (used for reading query string parameters)

https://github.com/bartgrantham/qs_parse

Copyright (c) 2010 Bart Grantham
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.


TinySHA1 (used during the websocket handshake, not for security)

https://github.com/mohaps/TinySHA1

TinySHA1 - a header only implementation of the SHA1 algorithm. Based on the
implementation in boost::uuid::details

Copyright (c) 2012-22 SAURAV MOHAPATRA [email protected]
Permission to use, copy, modify, and distribute this software for any purpose
with or without fee is hereby granted, provided that the above copyright 
notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, 
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.

Comments

error: 'z_stream' was not declared in this scope

Hello I'm having trouble integrating crow in my system program. I previously used crow no issues in a standalone program I built with -lpthread -lboost_system -lz. Now with static building it has introduced these compiler errors:

The only difference I'm imagining is the addition of building with jemmaloc and a different version of boost?

Any help would be greatly appreciated!

root@f6c760e66602:/home/expo/resilientdb# make
g++ -c -Wall -g -gdwarf-3 -std=c++0x -rdynamic  -I. -I./benchmarks -I./client/ -I./transport -I./system -I./statistics -I./blockchain -I./smart_contracts  -I./data_structures -Ideps/jemalloc-5.1.0/include -Ideps/nng-1.3.2/include -Ideps/boost_1_76_0 -Ideps/crypto -I./db -Ideps/sqlite-autoconf-3290000/build/include  -D NOGRAPHITE=1 -Werror -Wno-sizeof-pointer-memaccess  -o obj/client_main.o client/client_main.cpp
In file included from client/client_main.cpp:17:0:
client/../deps/crow_all.h: In function 'std::__cxx11::string crow::compression::compress_string(const string&, crow::compression::algorithm)':
client/../deps/crow_all.h:6835:13: error: 'z_stream' was not declared in this scope
             z_stream stream{};
             ^~~~~~~~
client/../deps/crow_all.h:6835:13: note: suggested alternative: 'nng_stream'
             z_stream stream{};
             ^~~~~~~~
             nng_stream
client/../deps/crow_all.h:6837:19: error: '::deflateInit2' has not been declared
             if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEGY) == Z_OK)
                   ^~~~~~~~~~~~
client/../deps/crow_all.h:6837:33: error: 'stream' was not declared in this scope
             if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEGY) == Z_OK)
                                 ^~~~~~
client/../deps/crow_all.h:6837:33: note: suggested alternative: 'strcat'
             if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEGY) == Z_OK)
                                 ^~~~~~
                                 strcat
client/../deps/crow_all.h:6837:41: error: 'Z_DEFAULT_COMPRESSION' was not declared in this scope
             if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEGY) == Z_OK)
                                         ^~~~~~~~~~~~~~~~~~~~~
client/../deps/crow_all.h:6837:41: note: suggested alternative: '_DEFAULT_SOURCE'
             if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEGY) == Z_OK)
                                         ^~~~~~~~~~~~~~~~~~~~~
                                         _DEFAULT_SOURCE
client/../deps/crow_all.h:6837:64: error: 'Z_DEFLATED' was not declared in this scope
             if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEGY) == Z_OK)
                                                                ^~~~~~~~~~
client/../deps/crow_all.h:6837:64: note: suggested alternative: 'DEFLATE'
             if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEGY) == Z_OK)
                                                                ^~~~~~~~~~
                                                                DEFLATE
client/../deps/crow_all.h:6837:85: error: 'Z_DEFAULT_STRATEGY' was not declared in this scope
             if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEG
) == Z_OK)
                                                                                     ^~~~~~~~~~~~~~~~~
client/../deps/crow_all.h:6837:85: note: suggested alternative: '_DEFAULT_SOURCE'
             if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEG
) == Z_OK)
                                                                                     ^~~~~~~~~~~~~~~~~
                                                                                     _DEFAULT_SOURCE
client/../deps/crow_all.h:6837:108: error: 'Z_OK' was not declared in this scope
   if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEGY) == Z_OK)
                                                                                                  ^~~~
client/../deps/crow_all.h:6837:108: note: suggested alternative: 'F_OK'
   if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEGY) == Z_OK)
                                                                                                  ^~~~

     F_OK
client/../deps/crow_all.h:6843:45: error: 'Bytef' does not name a type; did you mean 'byte'?
                 stream.next_in = const_cast<Bytef *>(reinterpret_cast<const Bytef *>(str.c_str()));
                                             ^~~~~
                                             byte
client/../deps/crow_all.h:6843:51: error: expected '>' before '*' token
                 stream.next_in = const_cast<Bytef *>(reinterpret_cast<const Bytef *>(str.c_str()));
                                                   ^
client/../deps/crow_all.h:6843:51: error: expected '(' before '*' token
client/../deps/crow_all.h:6843:52: error: expected primary-expression before '>' token
                 stream.next_in = const_cast<Bytef *>(reinterpret_cast<const Bytef *>(str.c_str()));
                                                    ^
client/../deps/crow_all.h:6843:77: error: ISO C++ forbids declaration of 'type name' with no type [-fpermissive]
                 stream.next_in = const_cast<Bytef *>(reinterpret_cast<const Bytef *>(str.c_str()));
                                                                             ^~~~~
client/../deps/crow_all.h:6843:77: error: expected '>' before 'Bytef'
client/../deps/crow_all.h:6843:77: error: expected '(' before 'Bytef'
client/../deps/crow_all.h:6843:77: error: 'Bytef' was not declared in this scope
client/../deps/crow_all.h:6843:77: note: suggested alternative: 'byte'
                 stream.next_in = const_cast<Bytef *>(reinterpret_cast<const Bytef *>(str.c_str()));
                                                                             ^~~~~
                                                                             byte
client/../deps/crow_all.h:6843:84: error: expected primary-expression before '>' token
                 stream.next_in = const_cast<Bytef *>(reinterpret_cast<const Bytef *>(str.c_str()));
                                                                                    ^
client/../deps/crow_all.h:6843:99: error: expected ')' before ';' token
                 stream.next_in = const_cast<Bytef *>(reinterpret_cast<const Bytef *>(str.c_str()));
                                                                                                   ^
client/../deps/crow_all.h:6843:99: error: expected ')' before ';' token
client/../deps/crow_all.h:6849:56: error: 'Bytef' does not name a type; did you mean 'byte'?
                     stream.next_out = reinterpret_cast<Bytef *>(&buffer[0]);
                                                        ^~~~~
                                                        byte
client/../deps/crow_all.h:6849:62: error: expected '>' before '*' token
                     stream.next_out = reinterpret_cast<Bytef *>(&buffer[0]);
                                                              ^
client/../deps/crow_all.h:6849:62: error: expected '(' before '*' token
client/../deps/crow_all.h:6849:63: error: expected primary-expression before '>' token
                     stream.next_out = reinterpret_cast<Bytef *>(&buffer[0]);
                                                               ^
client/../deps/crow_all.h:6849:76: error: expected ')' before ';' token
                     stream.next_out = reinterpret_cast<Bytef *>(&buffer[0]);
                                                                            ^
client/../deps/crow_all.h:6851:30: error: '::deflate' has not been declared
                     code = ::deflate(&stream, Z_FINISH);
                              ^~~~~~~
client/../deps/crow_all.h:6851:30: note: suggested alternative: 'getdate'
                     code = ::deflate(&stream, Z_FINISH);
                              ^~~~~~~
                              getdate
client/../deps/crow_all.h:6851:47: error: 'Z_FINISH' was not declared in this scope
                     code = ::deflate(&stream, Z_FINISH);
                                               ^~~~~~~~
client/../deps/crow_all.h:6851:47: note: suggested alternative: 'FINISH'
                     code = ::deflate(&stream, Z_FINISH);
                                               ^~~~~~~~
                                               FINISH
client/../deps/crow_all.h:6853:49: error: 'Z_STREAM_END' was not declared in this scope
                     if (code == Z_OK || code == Z_STREAM_END)
                                                 ^~~~~~~~~~~~
client/../deps/crow_all.h:6853:49: note: suggested alternative: '_ISTREAM_TCC'
                     if (code == Z_OK || code == Z_STREAM_END)
                                                 ^~~~~~~~~~~~
                                                 _ISTREAM_TCC
client/../deps/crow_all.h:6860:29: error: 'Z_STREAM_END' was not declared in this scope
                 if (code != Z_STREAM_END)
                             ^~~~~~~~~~~~
client/../deps/crow_all.h:6860:29: note: suggested alternative: '_ISTREAM_TCC'
                 if (code != Z_STREAM_END)
                             ^~~~~~~~~~~~
                             _ISTREAM_TCC
client/../deps/crow_all.h:6863:19: error: '::deflateEnd' has not been declared
                 ::deflateEnd(&stream);
                   ^~~~~~~~~~
client/../deps/crow_all.h: In function 'std::__cxx11::string crow::compression::decompress_string(const string&)':
client/../deps/crow_all.h:6872:13: error: 'Bytef' was not declared in this scope
             Bytef tmp[8192];
             ^~~~~
client/../deps/crow_all.h:6872:13: note: suggested alternative: 'byte'
             Bytef tmp[8192];
             ^~~~~
             byte
client/../deps/crow_all.h:6874:13: error: 'z_stream' was not declared in this scope
             z_stream zstream{};
             ^~~~~~~~
client/../deps/crow_all.h:6874:13: note: suggested alternative: 'nng_stream'
             z_stream zstream{};
             ^~~~~~~~
             nng_stream
client/../deps/crow_all.h:6875:13: error: 'zstream' was not declared in this scope
             zstream.avail_in = deflated_string.size();
             ^~~~~~~
client/../deps/crow_all.h:6875:13: note: suggested alternative: 'strcat'
             zstream.avail_in = deflated_string.size();
             ^~~~~~~
             strcat
client/../deps/crow_all.h:6877:42: error: 'Bytef' does not name a type; did you mean 'byte'?
             zstream.next_in = const_cast<Bytef *>(reinterpret_cast<Bytef const *>(deflated_string.c_str()));
                                          ^~~~~
                                          byte
client/../deps/crow_all.h:6877:48: error: expected '>' before '*' token
             zstream.next_in = const_cast<Bytef *>(reinterpret_cast<Bytef const *>(deflated_string.c_str()));
                                                ^
client/../deps/crow_all.h:6877:48: error: expected '(' before '*' token
client/../deps/crow_all.h:6877:49: error: expected primary-expression before '>' token
             zstream.next_in = const_cast<Bytef *>(reinterpret_cast<Bytef const *>(deflated_string.c_str()));
                                                 ^
client/../deps/crow_all.h:6877:68: error: 'Bytef' does not name a type; did you mean 'byte'?
             zstream.next_in = const_cast<Bytef *>(reinterpret_cast<Bytef const *>(deflated_string.c_str()));
                                                                    ^~~~~
                                                                    byte
client/../deps/crow_all.h:6877:74: error: expected '>' before 'const'
             zstream.next_in = const_cast<Bytef *>(reinterpret_cast<Bytef const *>(deflated_string.c_str()));
                                                                          ^~~~~
client/../deps/crow_all.h:6877:74: error: expected '(' before 'const'
client/../deps/crow_all.h:6877:74: error: expected primary-expression before 'const'
client/../deps/crow_all.h:6877:74: error: expected ')' before 'const'
client/../deps/crow_all.h:6877:74: error: expected ')' before 'const'
client/../deps/crow_all.h:6877:108: error: expected ')' before ';' token
       zstream.next_in = const_cast<Bytef *>(reinterpret_cast<Bytef const *>(deflated_string.c_str()))

client/../deps/crow_all.h:6879:19: error: '::inflateInit2' has not been declared
             if (::inflateInit2(&zstream, MAX_WBITS | 32) == Z_OK)
                   ^~~~~~~~~~~~
client/../deps/crow_all.h:6879:19: note: suggested alternative: 'inflated_string'
             if (::inflateInit2(&zstream, MAX_WBITS | 32) == Z_OK)
                   ^~~~~~~~~~~~
                   inflated_string
client/../deps/crow_all.h:6879:42: error: 'MAX_WBITS' was not declared in this scope
             if (::inflateInit2(&zstream, MAX_WBITS | 32) == Z_OK)
                                          ^~~~~~~~~
client/../deps/crow_all.h:6879:42: note: suggested alternative: 'GAI_WAIT'
             if (::inflateInit2(&zstream, MAX_WBITS | 32) == Z_OK)
                                          ^~~~~~~~~
                                          GAI_WAIT
client/../deps/crow_all.h:6879:61: error: 'Z_OK' was not declared in this scope
             if (::inflateInit2(&zstream, MAX_WBITS | 32) == Z_OK)
                                                             ^~~~
client/../deps/crow_all.h:6879:61: note: suggested alternative: 'F_OK'
             if (::inflateInit2(&zstream, MAX_WBITS | 32) == Z_OK)
                                                             ^~~~
                                                             F_OK
client/../deps/crow_all.h:6883:48: error: 'tmp' was not declared in this scope
                     zstream.avail_out = sizeof(tmp);
                                                ^~~
client/../deps/crow_all.h:6883:48: note: suggested alternative: 'tcp'
                     zstream.avail_out = sizeof(tmp);
                                                ^~~
                                                tcp
client/../deps/crow_all.h:6886:34: error: '::inflate' has not been declared
                     auto ret = ::inflate(&zstream, Z_NO_FLUSH);
                                  ^~~~~~~
client/../deps/crow_all.h:6886:34: note: suggested alternative: 'iface'
                     auto ret = ::inflate(&zstream, Z_NO_FLUSH);
                                  ^~~~~~~
                                  iface
client/../deps/crow_all.h:6886:52: error: 'Z_NO_FLUSH' was not declared in this scope
                     auto ret = ::inflate(&zstream, Z_NO_FLUSH);
                                                    ^~~~~~~~~~
client/../deps/crow_all.h:6886:52: note: suggested alternative: 'NOFLSH'
                     auto ret = ::inflate(&zstream, Z_NO_FLUSH);
                                                    ^~~~~~~~~~
                                                    NOFLSH
client/../deps/crow_all.h:6887:47: error: 'Z_STREAM_END' was not declared in this scope
                     if (ret == Z_OK || ret == Z_STREAM_END)
                                               ^~~~~~~~~~~~
client/../deps/crow_all.h:6887:47: note: suggested alternative: '_ISTREAM_TCC'
                     if (ret == Z_OK || ret == Z_STREAM_END)
                                               ^~~~~~~~~~~~
                                               _ISTREAM_TCC
client/../deps/crow_all.h:6901:19: error: '::inflateEnd' has not been declared
                 ::inflateEnd(&zstream);
                   ^~~~~~~~~~
Makefile:79: recipe for target 'obj/client_main.o' failed
make: *** [obj/client_main.o] Error 1
root@f6c760e66602:/home/expo/resilientdb# make
g++ -c -Wall -g -gdwarf-3 -std=c++0x -rdynamic  -I. -I./benchmarks -I./client/ -I./transport -I./system -I./statistics -I./blockchain -I./smart_contracts  -I./data_structures -Ideps/jemalloc-5.1.0/include -Ideps/nng-1.3.2/include -Ideps/boost_1_76_0 -Ideps/crypto -I./db -Ideps/sqlite-autoconf-3290000/build/include  -D NOGRAPHITE=1 -Werror -Wno-sizeof-pointer-memaccess  -o obj/client_main.o client/client_main.cpp
In file included from client/client_main.cpp:17:0:
client/../deps/crow_all.h: In function 'std::__cxx11::string crow::compression::compress_string(const string&, crow::compression::algorithm)':
client/../deps/crow_all.h:6835:13: error: 'z_stream' was not declared in this scope
             z_stream stream{};
             ^~~~~~~~
client/../deps/crow_all.h:6835:13: note: suggested alternative: 'nng_stream'
             z_stream stream{};
             ^~~~~~~~
             nng_stream
client/../deps/crow_all.h:6837:19: error: '::deflateInit2' has not been declared
             if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEGY) == Z_OK)
                   ^~~~~~~~~~~~
client/../deps/crow_all.h:6837:33: error: 'stream' was not declared in this scope
             if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEGY) == Z_OK)
                                 ^~~~~~
client/../deps/crow_all.h:6837:33: note: suggested alternative: 'strcat'
             if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEGY) == Z_OK)
                                 ^~~~~~
                                 strcat
client/../deps/crow_all.h:6837:41: error: 'Z_DEFAULT_COMPRESSION' was not declared in this scope
             if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEGY) == Z_OK)
                                         ^~~~~~~~~~~~~~~~~~~~~
client/../deps/crow_all.h:6837:41: note: suggested alternative: '_DEFAULT_SOURCE'
             if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEGY) == Z_OK)
                                         ^~~~~~~~~~~~~~~~~~~~~
                                         _DEFAULT_SOURCE
client/../deps/crow_all.h:6837:64: error: 'Z_DEFLATED' was not declared in this scope
             if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEGY) == Z_OK)
                                                                ^~~~~~~~~~
client/../deps/crow_all.h:6837:64: note: suggested alternative: 'DEFLATE'
             if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEGY) == Z_OK)
                                                                ^~~~~~~~~~
                                                                DEFLATE
client/../deps/crow_all.h:6837:85: error: 'Z_DEFAULT_STRATEGY' was not declared in this scope
             if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEG
) == Z_OK)
                                                                                     ^~~~~~~~~~~~~~~~~
client/../deps/crow_all.h:6837:85: note: suggested alternative: '_DEFAULT_SOURCE'
             if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEG
) == Z_OK)
                                                                                     ^~~~~~~~~~~~~~~~~
                                                                                     _DEFAULT_SOURCE
client/../deps/crow_all.h:6837:108: error: 'Z_OK' was not declared in this scope
   if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEGY) == Z_OK)
                                                                                                  ^~~~
client/../deps/crow_all.h:6837:108: note: suggested alternative: 'F_OK'
   if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEGY) == Z_OK)
                                                                                                  ^~~~

     F_OK
client/../deps/crow_all.h:6843:45: error: 'Bytef' does not name a type; did you mean 'byte'?
                 stream.next_in = const_cast<Bytef *>(reinterpret_cast<const Bytef *>(str.c_str()));
                                             ^~~~~
                                             byte
client/../deps/crow_all.h:6843:51: error: expected '>' before '*' token
                 stream.next_in = const_cast<Bytef *>(reinterpret_cast<const Bytef *>(str.c_str()));
                                                   ^
client/../deps/crow_all.h:6843:51: error: expected '(' before '*' token
client/../deps/crow_all.h:6843:52: error: expected primary-expression before '>' token
                 stream.next_in = const_cast<Bytef *>(reinterpret_cast<const Bytef *>(str.c_str()));
                                                    ^
client/../deps/crow_all.h:6843:77: error: ISO C++ forbids declaration of 'type name' with no type [-fpermissive]
                 stream.next_in = const_cast<Bytef *>(reinterpret_cast<const Bytef *>(str.c_str()));
                                                                             ^~~~~
client/../deps/crow_all.h:6843:77: error: expected '>' before 'Bytef'
client/../deps/crow_all.h:6843:77: error: expected '(' before 'Bytef'
client/../deps/crow_all.h:6843:77: error: 'Bytef' was not declared in this scope
client/../deps/crow_all.h:6843:77: note: suggested alternative: 'byte'
                 stream.next_in = const_cast<Bytef *>(reinterpret_cast<const Bytef *>(str.c_str()));
                                                                             ^~~~~
                                                                             byte
client/../deps/crow_all.h:6843:84: error: expected primary-expression before '>' token
                 stream.next_in = const_cast<Bytef *>(reinterpret_cast<const Bytef *>(str.c_str()));
                                                                                    ^
client/../deps/crow_all.h:6843:99: error: expected ')' before ';' token
                 stream.next_in = const_cast<Bytef *>(reinterpret_cast<const Bytef *>(str.c_str()));
                                                                                                   ^
client/../deps/crow_all.h:6843:99: error: expected ')' before ';' token
client/../deps/crow_all.h:6849:56: error: 'Bytef' does not name a type; did you mean 'byte'?
                     stream.next_out = reinterpret_cast<Bytef *>(&buffer[0]);
                                                        ^~~~~
                                                        byte
client/../deps/crow_all.h:6849:62: error: expected '>' before '*' token
                     stream.next_out = reinterpret_cast<Bytef *>(&buffer[0]);
                                                              ^
client/../deps/crow_all.h:6849:62: error: expected '(' before '*' token
client/../deps/crow_all.h:6849:63: error: expected primary-expression before '>' token
                     stream.next_out = reinterpret_cast<Bytef *>(&buffer[0]);
                                                               ^
client/../deps/crow_all.h:6849:76: error: expected ')' before ';' token
                     stream.next_out = reinterpret_cast<Bytef *>(&buffer[0]);
                                                                            ^
client/../deps/crow_all.h:6851:30: error: '::deflate' has not been declared
                     code = ::deflate(&stream, Z_FINISH);
                              ^~~~~~~
client/../deps/crow_all.h:6851:30: note: suggested alternative: 'getdate'
                     code = ::deflate(&stream, Z_FINISH);
                              ^~~~~~~
                              getdate
client/../deps/crow_all.h:6851:47: error: 'Z_FINISH' was not declared in this scope
                     code = ::deflate(&stream, Z_FINISH);
                                               ^~~~~~~~
client/../deps/crow_all.h:6851:47: note: suggested alternative: 'FINISH'
                     code = ::deflate(&stream, Z_FINISH);
                                               ^~~~~~~~
                                               FINISH
client/../deps/crow_all.h:6853:49: error: 'Z_STREAM_END' was not declared in this scope
                     if (code == Z_OK || code == Z_STREAM_END)
                                                 ^~~~~~~~~~~~
client/../deps/crow_all.h:6853:49: note: suggested alternative: '_ISTREAM_TCC'
                     if (code == Z_OK || code == Z_STREAM_END)
                                                 ^~~~~~~~~~~~
                                                 _ISTREAM_TCC
client/../deps/crow_all.h:6860:29: error: 'Z_STREAM_END' was not declared in this scope
                 if (code != Z_STREAM_END)
                             ^~~~~~~~~~~~
client/../deps/crow_all.h:6860:29: note: suggested alternative: '_ISTREAM_TCC'
                 if (code != Z_STREAM_END)
                             ^~~~~~~~~~~~
                             _ISTREAM_TCC
client/../deps/crow_all.h:6863:19: error: '::deflateEnd' has not been declared
                 ::deflateEnd(&stream);
                   ^~~~~~~~~~
client/../deps/crow_all.h: In function 'std::__cxx11::string crow::compression::decompress_string(const string&)':
client/../deps/crow_all.h:6872:13: error: 'Bytef' was not declared in this scope
             Bytef tmp[8192];
             ^~~~~
client/../deps/crow_all.h:6872:13: note: suggested alternative: 'byte'
             Bytef tmp[8192];
             ^~~~~
             byte
client/../deps/crow_all.h:6874:13: error: 'z_stream' was not declared in this scope
             z_stream zstream{};
             ^~~~~~~~
client/../deps/crow_all.h:6874:13: note: suggested alternative: 'nng_stream'
             z_stream zstream{};
             ^~~~~~~~
             nng_stream
client/../deps/crow_all.h:6875:13: error: 'zstream' was not declared in this scope
             zstream.avail_in = deflated_string.size();
             ^~~~~~~
client/../deps/crow_all.h:6875:13: note: suggested alternative: 'strcat'
             zstream.avail_in = deflated_string.size();
             ^~~~~~~
             strcat
client/../deps/crow_all.h:6877:42: error: 'Bytef' does not name a type; did you mean 'byte'?
             zstream.next_in = const_cast<Bytef *>(reinterpret_cast<Bytef const *>(deflated_string.c_str()));
                                          ^~~~~
                                          byte
client/../deps/crow_all.h:6877:48: error: expected '>' before '*' token
             zstream.next_in = const_cast<Bytef *>(reinterpret_cast<Bytef const *>(deflated_string.c_str()));
                                                ^
client/../deps/crow_all.h:6877:48: error: expected '(' before '*' token
client/../deps/crow_all.h:6877:49: error: expected primary-expression before '>' token
             zstream.next_in = const_cast<Bytef *>(reinterpret_cast<Bytef const *>(deflated_string.c_str()));
                                                 ^
client/../deps/crow_all.h:6877:68: error: 'Bytef' does not name a type; did you mean 'byte'?
             zstream.next_in = const_cast<Bytef *>(reinterpret_cast<Bytef const *>(deflated_string.c_str()));
                                                                    ^~~~~
                                                                    byte
client/../deps/crow_all.h:6877:74: error: expected '>' before 'const'
             zstream.next_in = const_cast<Bytef *>(reinterpret_cast<Bytef const *>(deflated_string.c_str()));
                                                                          ^~~~~
client/../deps/crow_all.h:6877:74: error: expected '(' before 'const'
client/../deps/crow_all.h:6877:74: error: expected primary-expression before 'const'
client/../deps/crow_all.h:6877:74: error: expected ')' before 'const'
client/../deps/crow_all.h:6877:74: error: expected ')' before 'const'
client/../deps/crow_all.h:6877:108: error: expected ')' before ';' token
       zstream.next_in = const_cast<Bytef *>(reinterpret_cast<Bytef const *>(deflated_string.c_str()))

client/../deps/crow_all.h:6879:19: error: '::inflateInit2' has not been declared
             if (::inflateInit2(&zstream, MAX_WBITS | 32) == Z_OK)
                   ^~~~~~~~~~~~
client/../deps/crow_all.h:6879:19: note: suggested alternative: 'inflated_string'
             if (::inflateInit2(&zstream, MAX_WBITS | 32) == Z_OK)
                   ^~~~~~~~~~~~
                   inflated_string
client/../deps/crow_all.h:6879:42: error: 'MAX_WBITS' was not declared in this scope
             if (::inflateInit2(&zstream, MAX_WBITS | 32) == Z_OK)
                                          ^~~~~~~~~
client/../deps/crow_all.h:6879:42: note: suggested alternative: 'GAI_WAIT'
             if (::inflateInit2(&zstream, MAX_WBITS | 32) == Z_OK)
                                          ^~~~~~~~~
                                          GAI_WAIT
client/../deps/crow_all.h:6879:61: error: 'Z_OK' was not declared in this scope
             if (::inflateInit2(&zstream, MAX_WBITS | 32) == Z_OK)
                                                             ^~~~
client/../deps/crow_all.h:6879:61: note: suggested alternative: 'F_OK'
             if (::inflateInit2(&zstream, MAX_WBITS | 32) == Z_OK)
                                                             ^~~~
                                                             F_OK
client/../deps/crow_all.h:6883:48: error: 'tmp' was not declared in this scope
                     zstream.avail_out = sizeof(tmp);
                                                ^~~
client/../deps/crow_all.h:6883:48: note: suggested alternative: 'tcp'
                     zstream.avail_out = sizeof(tmp);
                                                ^~~
                                                tcp
client/../deps/crow_all.h:6886:34: error: '::inflate' has not been declared
                     auto ret = ::inflate(&zstream, Z_NO_FLUSH);
                                  ^~~~~~~
client/../deps/crow_all.h:6886:34: note: suggested alternative: 'iface'
                     auto ret = ::inflate(&zstream, Z_NO_FLUSH);
                                  ^~~~~~~
                                  iface
client/../deps/crow_all.h:6886:52: error: 'Z_NO_FLUSH' was not declared in this scope
                     auto ret = ::inflate(&zstream, Z_NO_FLUSH);
                                                    ^~~~~~~~~~
client/../deps/crow_all.h:6886:52: note: suggested alternative: 'NOFLSH'
                     auto ret = ::inflate(&zstream, Z_NO_FLUSH);
                                                    ^~~~~~~~~~
                                                    NOFLSH
client/../deps/crow_all.h:6887:47: error: 'Z_STREAM_END' was not declared in this scope
                     if (ret == Z_OK || ret == Z_STREAM_END)
                                               ^~~~~~~~~~~~
client/../deps/crow_all.h:6887:47: note: suggested alternative: '_ISTREAM_TCC'
                     if (ret == Z_OK || ret == Z_STREAM_END)
                                               ^~~~~~~~~~~~
                                               _ISTREAM_TCC
client/../deps/crow_all.h:6901:19: error: '::inflateEnd' has not been declared
                 ::inflateEnd(&zstream);
                   ^~~~~~~~~~
Makefile:79: recipe for target 'obj/client_main.o' failed
make: *** [obj/client_main.o] Error 1

opened by alejandroarmas 22

Installing Crow

With the work on vcpkg and different Linux package managers, Crow can now be installed rather than just included in the downstream project.

The idea has often been to just use crow_all.h which probably works for small projects, but I'm not sure about larger ones, since a larger project might want to use certain components in one source file and not others. (I might be wrong here and a single header is all that is actually needed, please correct me if so)

So the first question is: Should crow by default be installed as a set of header files or just the single header file?

This will shape how the documentation and releases are made moving forward.
task

opened by The-EDev 21
build failed about ASIO_ASSERT

Sorry sir, I'm a rookie again. I just installed the standalone version of ASIO as you said last time and rebuild it according to the website. https://crowcpp.org/master/getting_started/setup/linux/

Environment： ubuntu 20.04.1 gcc 9.4.0 asio 1.18.1

Sorry,I haven't used anything about boost before.

I tried many times to search for a lot of related instructions, but it didn't work out.The error is as follows：

In file included from /usr/include/c++/9/cassert:44, from /usr/local/include/asio/detail/assert.hpp:23, from /usr/local/include/asio/execution/any_executor.hpp:21, from /usr/local/include/asio/execution.hpp:19, from /usr/local/include/asio/system_executor.hpp:20, from /usr/local/include/asio/associated_executor.hpp:22, from /usr/local/include/asio.hpp:19, from /usr/local/include/crow/socket_adaptors.h:3, from /usr/local/include/crow.h:7, from main.cpp:1: /usr/local/include/asio/detail/buffered_stream_storage.hpp: In member function ‘void asio::detail::buffered_stream_storage::resize(asio::detail::buffered_stream_storage::size_type)’: /usr/local/include/asio/detail/buffered_stream_storage.hpp:81:5: error: ‘__assert_fail’ was not declared in this scope; did you mean ‘crow::__assert_fail’? 81 | ASIO_ASSERT(length <= capacity()); | ^~~~~~~~~~~ In file included from /usr/local/include/crow/http_parser_merged.h:191, from /usr/local/include/crow.h:3, from main.cpp:1: /usr/include/assert.h:69:13: note: ‘crow::__assert_fail’ declared here 69 | extern void __assert_fail (const char *__assertion, const char *__file, | ^~~~~~~~~~~~~ In file included from /usr/include/c++/9/cassert:44, from /usr/local/include/asio/detail/assert.hpp:23, from /usr/local/include/asio/execution/any_executor.hpp:21, from /usr/local/include/asio/execution.hpp:19, from /usr/local/include/asio/system_executor.hpp:20, from /usr/local/include/asio/associated_executor.hpp:22, from /usr/local/include/asio.hpp:19, from /usr/local/include/crow/socket_adaptors.h:3, from /usr/local/include/crow.h:7, from main.cpp:1: /usr/local/include/asio/detail/buffered_stream_storage.hpp: In member function ‘void asio::detail::buffered_stream_storage::consume(asio::detail::buffered_stream_storage::size_type)’: /usr/local/include/asio/detail/buffered_stream_storage.hpp:104:5: error: ‘__assert_fail’ was not declared in this scope; did you mean ‘crow::assert_fail’? 104 | ASIO_ASSERT(begin_offset + count <= end_offset); | ^~~~~~~~~~~ In file included from /usr/local/include/crow/http_parser_merged.h:191, from /usr/local/include/crow.h:3, from main.cpp:1: /usr/include/assert.h:69:13: note: ‘crow::__assert_fail’ declared here 69 | extern void __assert_fail (const char *__assertion, const char *__file, | ^~~~~~~~~~~~~ In file included from /usr/include/c++/9/cassert:44, from /usr/local/include/asio/detail/assert.hpp:23, from /usr/local/include/asio/execution/any_executor.hpp:21, from /usr/local/include/asio/execution.hpp:19, from /usr/local/include/asio/system_executor.hpp:20, from /usr/local/include/asio/associated_executor.hpp:22, from /usr/local/include/asio.hpp:19, from /usr/local/include/crow/socket_adaptors.h:3, from /usr/local/include/crow.h:7, from main.cpp:1: /usr/local/include/asio/detail/posix_event.hpp: In instantiation of ‘void asio::detail::posix_event::signal_all(Lock&) [with Lock = asio::detail::conditionally_enabled_mutex::scoped_lock]’: /usr/local/include/asio/detail/conditionally_enabled_event.hpp:56:29: required from here /usr/local/include/asio/detail/posix_event.hpp:56:5: error: ‘__assert_fail’ was not declared in this scope; did you mean ‘crow::__assert_fail’? 56 | ASIO_ASSERT(lock.locked()); | ^~~~~~~~~~~ In file included from /usr/local/include/crow/http_parser_merged.h:191, from /usr/local/include/crow.h:3, from main.cpp:1: /usr/include/assert.h:69:13: note: ‘crow::__assert_fail’ declared here 69 | extern void __assert_fail (const char *__assertion, const char *__file, | ^~~~~~~~~~~~~ In file included from /usr/include/c++/9/cassert:44, from /usr/local/include/asio/detail/assert.hpp:23, from /usr/local/include/asio/execution/any_executor.hpp:21, from /usr/local/include/asio/execution.hpp:19, from /usr/local/include/asio/system_executor.hpp:20, from /usr/local/include/asio/associated_executor.hpp:22, from /usr/local/include/asio.hpp:19, from /usr/local/include/crow/socket_adaptors.h:3, from /usr/local/include/crow.h:7, from main.cpp:1: /usr/local/include/asio/detail/posix_event.hpp: In instantiation of ‘void asio::detail::posix_event::unlock_and_signal_one(Lock&) [with Lock = asio::detail::conditionally_enabled_mutex::scoped_lock]’: /usr/local/include/asio/detail/conditionally_enabled_event.hpp:64:40: required from here /usr/local/include/asio/detail/posix_event.hpp:66:5: error: ‘__assert_fail’ was not declared in this scope; did you mean ‘crow::__assert_fail’? 66 | ASIO_ASSERT(lock.locked()); | ^~~~~~~~~~~ In file included from /usr/local/include/crow/http_parser_merged.h:191, from /usr/local/include/crow.h:3, from main.cpp:1: /usr/include/assert.h:69:13: note: ‘crow::__assert_fail’ declared here 69 | extern void __assert_fail (const char *__assertion, const char *__file, | ^~~~~~~~~~~~~ In file included from /usr/include/c++/9/cassert:44, from /usr/local/include/asio/detail/assert.hpp:23, from /usr/local/include/asio/execution/any_executor.hpp:21, from /usr/local/include/asio/execution.hpp:19, from /usr/local/include/asio/system_executor.hpp:20, from /usr/local/include/asio/associated_executor.hpp:22, from /usr/local/include/asio.hpp:19, from /usr/local/include/crow/socket_adaptors.h:3, from /usr/local/include/crow.h:7, from main.cpp:1: /usr/local/include/asio/detail/posix_event.hpp: In instantiation of ‘bool asio::detail::posix_event::maybe_unlock_and_signal_one(Lock&) [with Lock = asio::detail::conditionally_enabled_mutex::scoped_lock]’: /usr/local/include/asio/detail/conditionally_enabled_event.hpp:80:53: required from here /usr/local/include/asio/detail/posix_event.hpp:90:5: error: ‘__assert_fail’ was not declared in this scope; did you mean ‘crow::__assert_fail’? 90 | ASIO_ASSERT(lock.locked()); | ^~~~~~~~~~~ In file included from /usr/local/include/crow/http_parser_merged.h:191, from /usr/local/include/crow.h:3, from main.cpp:1: /usr/include/assert.h:69:13: note: ‘crow::__assert_fail’ declared here 69 | extern void __assert_fail (const char *__assertion, const char *__file, | ^~~~~~~~~~~~~ In file included from /usr/include/c++/9/cassert:44, from /usr/local/include/asio/detail/assert.hpp:23, from /usr/local/include/asio/execution/any_executor.hpp:21, from /usr/local/include/asio/execution.hpp:19, from /usr/local/include/asio/system_executor.hpp:20, from /usr/local/include/asio/associated_executor.hpp:22, from /usr/local/include/asio.hpp:19, from /usr/local/include/crow/socket_adaptors.h:3, from /usr/local/include/crow.h:7, from main.cpp:1: /usr/local/include/asio/detail/posix_event.hpp: In instantiation of ‘void asio::detail::posix_event::clear(Lock&) [with Lock = asio::detail::conditionally_enabled_mutex::scoped_lock]’: /usr/local/include/asio/detail/conditionally_enabled_event.hpp:89:24: required from here /usr/local/include/asio/detail/posix_event.hpp:105:5: error: ‘__assert_fail’ was not declared in this scope; did you mean ‘crow::__assert_fail’? 105 | ASIO_ASSERT(lock.locked()); | ^~~~~~~~~~~ In file included from /usr/local/include/crow/http_parser_merged.h:191, from /usr/local/include/crow.h:3, from main.cpp:1: /usr/include/assert.h:69:13: note: ‘crow::__assert_fail’ declared here 69 | extern void __assert_fail (const char *__assertion, const char *__file, | ^~~~~~~~~~~~~ In file included from /usr/include/c++/9/cassert:44, from /usr/local/include/asio/detail/assert.hpp:23, from /usr/local/include/asio/execution/any_executor.hpp:21, from /usr/local/include/asio/execution.hpp:19, from /usr/local/include/asio/system_executor.hpp:20, from /usr/local/include/asio/associated_executor.hpp:22, from /usr/local/include/asio.hpp:19, from /usr/local/include/crow/socket_adaptors.h:3, from /usr/local/include/crow.h:7, from main.cpp:1: /usr/local/include/asio/detail/posix_event.hpp: In instantiation of ‘void asio::detail::posix_event::wait(Lock&) [with Lock = asio::detail::conditionally_enabled_mutex::scoped_lock]’: /usr/local/include/asio/detail/conditionally_enabled_event.hpp:96:23: required from here /usr/local/include/asio/detail/posix_event.hpp:114:5: error: ‘__assert_fail’ was not declared in this scope; did you mean ‘crow::__assert_fail’? 114 | ASIO_ASSERT(lock.locked()); | ^~~~~~~~~~~ In file included from /usr/local/include/crow/http_parser_merged.h:191, from /usr/local/include/crow.h:3, from main.cpp:1: /usr/include/assert.h:69:13: note: ‘crow::__assert_fail’ declared here 69 | extern void __assert_fail (const char *__assertion, const char *__file, | ^~~~~~~~~~~~~ In file included from /usr/include/c++/9/cassert:44, from /usr/local/include/asio/detail/assert.hpp:23, from /usr/local/include/asio/execution/any_executor.hpp:21, from /usr/local/include/asio/execution.hpp:19, from /usr/local/include/asio/system_executor.hpp:20, from /usr/local/include/asio/associated_executor.hpp:22, from /usr/local/include/asio.hpp:19, from /usr/local/include/crow/socket_adaptors.h:3, from /usr/local/include/crow.h:7, from main.cpp:1: /usr/local/include/asio/detail/posix_event.hpp: In instantiation of ‘bool asio::detail::posix_event::wait_for_usec(Lock&, long int) [with Lock = asio::detail::conditionally_enabled_mutex::scoped_lock]’: /usr/local/include/asio/detail/conditionally_enabled_event.hpp:106:45: required from here /usr/local/include/asio/detail/posix_event.hpp:127:5: error: ‘__assert_fail’ was not declared in this scope; did you mean ‘crow::__assert_fail’? 127 | ASIO_ASSERT(lock.locked()); | ^~~~~~~~~~~ In file included from /usr/local/include/crow/http_parser_merged.h:191, from /usr/local/include/crow.h:3, from main.cpp:1: /usr/include/assert.h:69:13: note: ‘crow::__assert_fail’ declared here 69 | extern void __assert_fail (const char *__assertion, const char *__file,
bug

opened by doraemon-hub-art 17
HTTP server not recieving any messages after some time

I have implemented a HTTP server with single POST method handling. testing the same with jmeter with 600 users.

after some time the server does not receive any requests, kind of gets stuck. the maximum connection limit on my server is host is good enough. and after restarting the jmeter it again kind of stops after some time.

when its not receiving any messages i see i have 600 connections in established state( as testing with 600 users from jmeter)

Any idea what I could be missing?
bug

opened by gsp26 17
Compilation Errors

I'm having a small issue with the latest project using vcpkg on windows. I get the following compilation errors.

1>I:\vcpkg\installed\x64-windows\include\crow\json.h(749,47): error C2059: syntax error: '{' 1>I:\vcpkg\installed\x64-windows\include\crow\json.h(749,1): error C2143: syntax error: missing ';' before '{' 1>I:\vcpkg\installed\x64-windows\include\crow\json.h(749,1): error C2143: syntax error: missing ')' before ';' 1>I:\vcpkg\installed\x64-windows\include\crow\json.h(749,64): error C2059: syntax error: '&&' 1>I:\vcpkg\installed\x64-windows\include\crow\json.h(750,1): error C2143: syntax error: missing ';' before '{' 1>I:\vcpkg\installed\x64-windows\include\crow\json.h(750,62): error C2059: syntax error: '&&' 1>I:\vcpkg\installed\x64-windows\include\crow\json.h(751,1): error C2143: syntax error: missing ';' before '{' 1>I:\vcpkg\installed\x64-windows\include\crow\json.h(751,62): error C2059: syntax error: '&&' 1>I:\vcpkg\installed\x64-windows\include\crow\json.h(752,1): error C2143: syntax error: missing ';' before '{' 1>I:\vcpkg\installed\x64-windows\include\crow\json.h(752,1): error C2059: syntax error: ')'

Any help would be much appreciated.
bug further information required

opened by baylf2000 16

Websockets cause segfault when closing from server side

When I call crow::websocket::connection::close() server side, my application segfaults. Minimal example showing the problem I have:

#include "crow.h"
#include "crow/http_response.h"
#include "crow/json.h"
#include "crow/logging.h"
#include "crow/routing.h"
#include "crow/websocket.h"

int main(int, char**)
{
    crow::SimpleApp app;

    crow::websocket::connection* wsconn = nullptr;

    CROW_ROUTE(app, "/")([](const crow::request& req) {
        crow::response resp;
        resp.set_static_file_info("index.html");
        return resp;
    });

    CROW_ROUTE(app, "/ws").websocket()
        .onopen([&](crow::websocket::connection& conn) {
            wsconn = &conn;
        });
        .onclose([](crow::websocket::connection& conn, const std::string& reason) {
            CROW_LOG_INFO << reason;
        });

    CROW_ROUTE(app, "/disconnect")([&](const crow::request& req) {
        if(wsconn) {
            wsconn->close();
            wsconn = nullptr;
        }
        return crow::response(200);
    });

    app.port(18080).multithreaded().run();

    return 0;
}

index.html used:

<!DOCTYPE HTML>
<html>
<head>
  <meta charset="UTF-8">
  <title>Main</title>
</head>
<body>
<button type="button" onclick="disconnect()">Disconnect</button>
<script>
    var ws = new WebSocket("ws://localhost:18080/ws");

    function disconnect() {
        var req = new XMLHttpRequest();
        req.open("GET", "http://localhost:18080/disconnect", false);
        req.send(null);
    }
</script>
</body>
</html>

So the frontend opens a websocket and when the disconnect-button is clicked, the server should close it. I guess, I am doing something wrong, besides multiple connections cannot be handled in this example :) The onclose()-handler is called, I get reason logged. And then segfault.

bug

opened by MichaelSB 15

Change the following project settings:Multiple Headers,Single Headers

Hello ,

Could you explain how to change these in xcode ? I read on the web that It means to make #include "(path to boost)" but it does not work.

It would be a lot better if you could do a yt video tutorial.

thx in advance
question

opened by Daviddbalaban 14
SSL connect error

Hi, I am using Crow for a webapp I am working on, together with libquickmail to send emails. Libquickmail works just fine on it's own, but whenever I use it in the Crow app it crashes.

Respectively, I have a function in a shared library that sends an email. When I link that .so from a non-Crow program, all works fine, but when I link it from the Crow app, it either crashes (if not in a CROW_ROUTE macro; the program jsut returns -1 with no additional errors), or throws an SSL connect error (if used in the CROW_ROUTE macro).

SSL connect error: OpenSSL SSL_connect: SSL_ERROR_SYSCALL in connection to [SMTP SERVER ADDRESS]

The email function itself doesn't change, and neither does the server address/login details. Is there anything in Crow that could be causing this to happen? So far, I've tried testing if it could be multi-threading (doesn't seem to be an issue), and loading from a .so (which also isn't an issue in a non-Crow app), but I am slightly running out of ideas. Libquickmail uses cURL, if that is significant.

I'd be very grateful for any advice, please ask if you need any more details
bug

opened by 0XPW87 13
Using Code::Blocks IDE

I understand that Visual Studio is supported on Windows using VCPKG. However, I cannot seem to find any documentation on what is required to be able to build using Code::Blocks. Is there any documentation or pointers that can be provided?
question

opened by m1c999 13
Example using Crow with Google Charts?

Thank you for your excellent work! I have run your Hello World example successfully.

I would like to use Crow to plot XY-plots of sensor data in a web browser, i.e. time series. I have C++ libraries to access the data.

I see 2 possibilities. Either produce a PNG image on the server and show it in the browser, or better pass the time series data to the client side and plot it using Google Charts. My question is whether an example exists showing a Crow application returning data to Google Charts?
question

opened by arnholm 13

Sending file to crow backend

Hello!

I am trying to send a file (any extension) to a backend crow server.

I am using this piece of code and somehow files don't have the same SHA hash. In Visual Studio I have set to C++17 and Character Set to Use Multi-Byte Character Set.

CROW_ROUTE(app, "/file").methods("POST"_method) ([](const crow::request& req){
		crow::multipart::message msg(req);
		
		auto filepath = msg.parts[0].body;
		auto file = msg.parts[1].body;

		auto file_handler = std::ofstream(filepath);
		file_handler << file;

		file_handler.close();

		return crow::response(200, "Ok");
		});

What am I doing wrong?

Thank you!

bug

opened by mihdim777 13

Releases(v1.0+5)

v1.0+5(Aug 24, 2022)
Bug Prevent HTTP pipelining #524 CVE-2022-38667

Bug Fix stack data disclosure when returning static files smaller than 16KiB #523 CVE-2022-38668

Thanks to hebi and Gynvael Coldwind for discovering and reporting the vulnerabilities.
Source code(tar.gz)
Source code(zip)
crow-v1.0+5.deb(83.50 KB)
crow-v1.0+5.tar.gz(82.26 KB)
crow_all.h(430.62 KB)
v1.0+4(Jun 28, 2022)
Bug Fixed issue where an index in qs_parse is incorrectly incremented beyond the maximum possible value. #486

Source code(tar.gz)
Source code(zip)
crow-v1.0+4.deb(83.47 KB)
crow-v1.0+4.tar.gz(82.21 KB)
crow_all.h(430.55 KB)
v1.0+3(May 7, 2022)
Bug Fixed multiple definition error for CORS middleware. @dranikpg #395

Source code(tar.gz)
Source code(zip)
crow-v1.0+3.deb(83.58 KB)
crow-v1.0+3.tar.gz(82.30 KB)
crow_all.h(430.55 KB)
v1.0+2(Apr 29, 2022)
Bug Fixed issue where Crow would not Compile on GCC 4.8 (due to a G++ bug). #399

Bug Fixed exception when Crow doesn't know the extension of a static file. @danielskeenan #411

Bug Fixed issue where Crow wouldn't compile when using CROW_MIDDLEWARES with a pass-by-reference app. #396

Feature Allow using absolute file paths with static folders. @joelguittet #419

Bug Fixed issue where SSL websockets wouldn't run due to HTTP upgrade. @jeanbiber #393

Bug Fixed issue where Logs from multiple threads would be merged together. @dhchen #404

Bug Fixed issue where responses to OPTIONS requests were missing a Content-Length header. @jeanbiber #424

Feature Allow setting up HTTPS using SSL chain files. @jeanbiber #424

Doxygen can now document SSL and Compression parts. #424

Typo fixes. @stephanecharette #424

Source code(tar.gz)
Source code(zip)
crow-v1.0+2.deb(83.56 KB)
crow-v1.0+2.tar.gz(82.29 KB)
crow_all.h(430.53 KB)
v1.0+1(Mar 30, 2022)
Bug Fixed issue where Crow wouldn't compile on GCC versions below 6.0. @sgoth #377

Source code(tar.gz)
Source code(zip)
crow-v1.0+1.deb(83.52 KB)
crow-v1.0+1.tar.gz(82.25 KB)
crow_all.h(429.17 KB)
v1.0(Mar 29, 2022)
With this release, Crow is production ready. I'm amazed and thankful for how far this project has come and I would like to thank everyone who contributed their time, skills, and money to move this project forward.

A special thanks to Crow's newest member, @luca-schlecker. Without his work, much of this release wouldn't be possible.

Packages / Dependencies

Proper CMake support (Crow is now a CMake target (library) as opposed to just using CMake to compile examples/tests). #228 #209 #218 #241

Change Crow CMake dependencies based on downstream project requirements. @Leon0402 #231

CMake install support. #228 #209 #218

Crow can now be compiled using C++20. @Leon0402 #265

Automated release process via release script. #162 #205 #228 #252

CMake uninstall support. @navidcity #305

Fixed local VCPKG manifest version. #207

Fixed vcpkg.json to work on linux. @Borwe #330

Added Crow license to crow_all.h. #165

Framework

Feature Allowed multiple source files for projects using Crow without the need for #define CROW_MAIN. #280 #186 @danielytics #192 @nekoffski #354

Feature Added a type of middleware that runs per route rather than globally. @dranikpg #327

Feature Replaced dumb_timer_queue with new task_timer. #278

Feature Replaced the round robin approach to assigning connections to threads to a load balancing system. @belugum #289

Feature Improved and optimize filename sanitization function. @neumannt #321

Feature Added Middleware to handle CORS rules. @dranikpg #348

Bug fixed issue where absolute unix paths were not sanitized. #334

Feature Added function to run the Crow app asynchronously. #359

Feature Added unsafe file loading functions. @zefrenchy #339

Feature Added Base64 decoder. #260 @neumannt #324

Feature Added function to get the port Crow is using. @nx10 #276

Bug Worked around GCC 8.3 bug that prevented Crow from compiling. @nx10 @CircuitCoder #287

Feature Updated Crow's thread count process to reflect the actual number of threads being used. #307

Websockets

Bug Fixed Issue where Crow assumes a single masked message means all other messages are masked as well. #282

Feature Enforce Websocket protocol (opt-in). #282

Feature Added functionality to get the remote IP address connected to the Websocket. #263

HTTP

Feature Implemented Blueprints for project organization (similar to Flask's Blueprints). #181 #205 #208 #242

Feature Upgraded, better integrated, and optimized the HTTP Parser Crow uses. #294 @navidcity #303 #349 @nekoffski #354 #371

Feature Re-implemented the Trie crow uses to match rules with URLs. #166

Bug Fixed problem where streaming a response would abruptly close the connection. #332

Feature Crow now uses an enum for HTTP status codes (200 or status::OK can be used). #230

Feature Added several HTTP status codes. @Zhavok92 #227 @kingster #367

Bug Fixed issue where enabling SSL but not using it caused incorrect redirects. #281

Feature Added app option to set threshold beyond which Crow streams a response. #245

Feature Catch-all Routes now have receive the error code in their response object. #205

Bug API Breaking Modified Parser to only allow GET method on HTTP/0.9. #262

Bug Fixed problem where static file info wasn't being cleared if no file was found. #338

Feature Added Automatic UTF-8 support through a middleware. #202

Feature Added content type constructor for response. @hg333 #212

Bug Replaced HTTPMethod::GET with HTTPMethod::Get in routing.h. @d35ha #191

Feature Recognized cleartext and SSL versions of HTTP/2 upgrade header. #332

API Breaking Fixed incorrect styling in for remote_ip_address. @himanshu007-creator #200

Multipart

Feature API Breaking Part headers are now in a map rather than a vector. #358

Feature Added function to get a part by name. #358

Bug Fixed a problem where Crow failed to parse a multipart request made using .Net HttpClient. #332

Feature API Breaking Added a boundary to the default content-type (gets set to the request's boundary if constructed from a request). #358

Feature Parts and headers can be cast to integer or double. #358

Mustache

Feature Added support for C++ lambdas in Mustache. #299

Feature API Breaking Added function to set a templates directory. #362

Bug Fixed missing ; in mustache escaping. #342

Feature API Breaking returning page.render() from a route now sets Content-Type header to HTML. #346

Bug Ensured const correctness in template_t. @neumannt #325

JSON

Feature JSON values can now be initialized using initializer lists. @lcsdavid #190 #203 #242

Bug Fixed problem where JSON would output nan or inf values. @Vhuynh25 @rremigius #328

Bug Fixed problem with excess recursion when reading JSON. @neumannt #326

Bug Made JSON float output faster and more accurate. #203

Logging

Feature API Breaking Simplified creating a custom logger. #288 #290

Feature Added Support for using local time in default logger. @kingster #368

Documentation

Added Landing Page. #197 #201 #228

Updated Site theme. #197 #228

Placed financial and code contributors on landing page. #228 #311 #373

Updated install documentation and separated instructions for different OSes. #228 #238 #293

Added Social media cards. #197 #203 #270

Added donate button to site header. #197

Added indicator for features introduced after v0.1. #197

Added HTTP Authentication tutorial. #293

Updated documentation to mention new features. #203 #228 #372

Made API reference more readable by removing parts only intended for internal use. #372

Improved visibility on readme gitter badge. #228

Fixed several typos. #297

Used proper markdown syntax in documentation. #270

CI/CD

Fixed issue where cpp-coveralls wasn't compatible with newer GCOV versions. #228

Fixed issue where PR coverage would affect master coverage results. #228

Fixed coveralls branch. #198

Removed pip3 command from PR workflow. #270

Testing / Examples

Examples can now compile on Windows. #209

Tests can now compile without CROW_ENABLE_COMPRESSION being defined. #209

Added Tests for HTTPS (SSL) version of Crow. #228 #130

Bug Fixed issue where the response stream test would randomly fail. #234

Tests now use Debug build (debug flags + without optimization). #228

Added unit test for server timeout. #277

Updated catch2 to v2.13.8. @neumannt #322

Added tests for content type constructor for response. @hg333 #213

Updated examples and tests to include JSON initializer lists. #190 #203

Fixed typo in example_with_all.cpp. @odeits #161

Other

Created a new logo. #172

Updated Crow License. #172 #228

Formatted framework source code using Crow's own clang-format rules (and created a bot to enforce the rules for all PRs). #286 #293

Source code(tar.gz)
Source code(zip)
crow-v1.0.deb(83.49 KB)
crow-v1.0.tar.gz(82.22 KB)
crow_all.h(429.02 KB)
v0.3+4(Jan 12, 2022)
This release fixes major problems in Crow, from a potential memory leak to a few security vulnerabilities. Everyone using v0.3 is advised to update to this version as soon as possible.

This will most likely be the last update to v0.3 as we prepare for the next release.

Bug Data leak when sending static files. #292

Bug Incorrect handling of signal handlers. @mcopik #296

Bug crow::json escapes UTF-8 characters above value 127. @mosolovsa #304

Bug Path Traversal and Content Injection exploits patched. @snyk Team #317

Source code(tar.gz)
Source code(zip)
crow-v0.3+4.deb(57.08 KB)
crow_all.h(376.11 KB)
v0.3+3(Oct 15, 2021)
This release fixes a few issues experienced mainly on windows. Note: While Crow did receive an updated build / release system, it isn't included in this release due to our desire to retain backwards compatibility. You can expect the new system to be in full effect with the next minor/major release.

Bug JSON strings not correctly dumped on Microsoft Windows with Multi Byte Character Set encoding. @lcsdavid #196

Bug Unresolved conversion warning fix. @lcsdavid #174

Updated All logos.

Source code(tar.gz)
Source code(zip)
crow-v0.3+3.deb(56.89 KB)
crow_all.h(372.64 KB)
v0.3+2(Jul 5, 2021)
My apologies for releasing another version so soon. This release fixes the following:

Bug disabling crow static folder makes all routes inaccessible #163

Source code(tar.gz)
Source code(zip)
crow-v0.3+2.deb(56.87 KB)
crow_all.h(372.58 KB)
v0.3+1(Jun 28, 2021)
quick patch fixing 1 issue:

Bug http_response: fix move assign operator not moving file_info. @luca-schlecker #157

Source code(tar.gz)
Source code(zip)
crow.deb(56.87 KB)
crow_all.h(372.58 KB)
v0.3(Jun 5, 2021)
This version feels almost mature enough to where I would call it v1.0. But due to lack of production environment testing, it will stay v0.3

I'm hoping to be able to add hotfixes for any bugs unseen or necessary fixes.

Thanks to every single person who contributed to this project! I hope I didn't forget to mention any of you.

Here are the changes:

Packages / Dependencies

CMake Improvements (for better compatibility with Conan recipes). @madduci, @prince-chrismc, and The Conan team. #96

Vcpkg Support. @thinking-tower #137

Fix CMake problem when Crow is built in a subdirectory of another project. @rittelle #103

More CMake Fixes. @ugermann #124

Crow can now be installed on the system using make install. @ayaankhan98 #80

Websockets

Bug Reset the internal header variable before every read. (fixing potential issues where read is run and no actual data is taken from the socket). #44

Bug Fixed potential crash when using SSL Websockets. @fran6co #44

Feature Added support for non masked client messages. #44

Feature Added functionality to send a ping message from the server. #44

Feature Exposed methods to send Ping and Pong to the end-user. #44

Feature Ping and Pong payloads to be larger than 127 bytes are now allowed. #44

HTTP

Feature Added Support for HTTP Compression using Zlib. @pierobot #93

Feature Made Compression (and Zlib dependency) optional (via macro). @alejandroarmas #142

Bug Fixed broken Static files due to Responses not being cleared. @rittelle #109

Feature Added Catch-all Route. @Tibbel #122 #126

Feature Users can now define anything they want a handler to return using the returnable class. #84

Feature Crow handler can now have Response alone as an argument (without Request). @ayaankhan98 @klaus-moon #76

Feature Server name can now be set to anything the User wants. @makaveli #79

Feature More robust redirection tools. #87

Feature methods pop(), pop_list(), pop_dict(), and keys() added to query_string. #132

Feature Crow now handles HEAD and OPTIONS HTTP methods automatically. #117

Bug Fixed issue where response is logged twice. #128

Static Files

Feature Created static folder similar to flask. #50

Feature Static File support was enabled on Windows. @epajarre #55

Mustache

Feature Crow logs a warning if a template is not found. @rittelle #102

Json

Feature crow::json::wvalue can now return any Json type, not just Json objects. #70

Feature crow::json::wvalue can now use either std::unordered_map or std::map (for organized results). #132

Feature Added lo() method to json::rvalue, returns a vector of json::rvalue containing whatever a json object or list has. #132

Feature Added constructor to create crow::json::wvalue from std::vector. #132

Feature Added keys() method to json::rvalue. #132

Feature Added size() to crow::json::wvalue. #132

Feature Added std::string() operator to json::rvalue (allows std::string(json["abc"]). #132

dump() is now part of crow::json::wvalue and is const. #70 @belugum #135

Feature Added copy constructor to crow::json::wvalue. #132

Documentation

Added Guides / Tutorials powered by mkdocs. #71 #72 #73 #74 #95 #132 @wentasah #134 @thinking-tower #137

Added in code documentation for most of the library. #65 #44 #61

Cleaned up a small problem with app.h documentation. #44

Small documentation error fix. @tibovanheule #114

Readme changes. #71

CI/CD

Travis replaced with Drone.io. #120

Testing / Examples

Added Websocket tests. #44

Added examples and tests for json and query_string new methods. #132

Bug #include for example_with_all. @supersaiyanmode #63

Bug Renamed CMake target: example -> basic_example. @supersaiyanmode #64

Bug Crow now reports the actual port from ASIO when running. @ChoppinBlockParty #119

Bug Mustache tests now included in coverage. #129

Other

merge_all.py is now windows compatible. #58

Added CROW_MAIN Macro to avoid multiple definition error of static variables. @fckxorg #111 #118

Crow's signal handler is now optional. @NRizzoInc @ilejn #85

MSVC compatibility fixes. @sfinktah #101

Better Xcode Compatibility. @dspverden #139

Recast 64-bit size_t to 32-bit int to remove MSVC warnings. @sfinktah #106

uint was replaced with unsigned, improving compatibility. @epajarre #54

Middlewares are now in a subfolder rather than being on the same level as the core library. #51

Moved Repository under "CrowCpp" organization.

Source code(tar.gz)
Source code(zip)
crow.deb(56.87 KB)
crow_all.h(372.53 KB)
0.2(Oct 31, 2020)
The first release in almost 3 years. This update adds compatibility with the latest boost version, along with many additions and fixes:

Packages / Dependencies

Minimum Boost version is now 1.7. #1

Removed Conanfile. #22

Websockets

Bug Update websocket.h function "void do_read()". #2

HTTP

Feature Static file support added (including automatic mime-type setting). #10

Feature Response streaming for large (larger than 1MB) response bodies added. #28 #33

Feature Multipart data support added. #15

Bug Fixed SSL reconnect issue #23

Bug Server now sends a shutdown signal to TCP sockets before closing the connection #23

Feature Added "405 method not allowed" error. #13

Feature Added method to set timeout #30

Mustache

Feature Updated specification files. #22 #35

Documentation

Added Doxygen to generate Reference. #7

Excluded 3rd Party libraries from Documentation. #20

Added documentation to app.h. #31

CI/CD

Restarted Travis and coveralls for the repository. #12

Updated OS to Ubuntu focal (20.04.1 LTS). #12

Started testing on AMD64 and ARM64 CPUs. #24

Changed testing GCC (9.3 now) and clang (7.0 now) versions. #24

make and ctest now use 4 threads instead of 2. #24

Excluded 3rd Party libraries from Coveralls. #20

Testing

Feature Tests now use Catch. #22

Other

All Scripts are now in the /scripts directory

logo changes

readme changes

Source code(tar.gz)
Source code(zip)
crow_all.h(337.51 KB)

A Fast and Easy to use microframework for the web.

Related tags

Overview

A Fast and Easy to use microframework for the web.

Description

Features

Still in development

Documentation

Examples

Hello World

JSON Response

Arguments

Handling JSON Requests

Setting Up / Building

Disclaimer

Attributions

Comments

Releases(v1.0+5)

v1.0+5(Aug 24, 2022)

v1.0+4(Jun 28, 2022)

v1.0+3(May 7, 2022)

v1.0+2(Apr 29, 2022)

v1.0+1(Mar 30, 2022)

v1.0(Mar 29, 2022)

Packages / Dependencies

Framework

Websockets

HTTP

Multipart

Mustache

JSON

Logging

Documentation

CI/CD

Testing / Examples

Other

v0.3+4(Jan 12, 2022)

v0.3+3(Oct 15, 2021)

v0.3+2(Jul 5, 2021)

v0.3+1(Jun 28, 2021)

v0.3(Jun 5, 2021)

Packages / Dependencies

Websockets

HTTP

Static Files

Mustache

Json

Documentation

CI/CD

Testing / Examples

Other

0.2(Oct 31, 2020)

Packages / Dependencies

Websockets

HTTP

Mustache

Documentation

CI/CD

Testing

Other

Owner

Crow

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