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POsend http request from tornado client to asynchronous cpp-netlib server
 

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  1. POsend http request from tornado client to asynchronous cpp-netlib server
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    <p>I have a http client that I wrote in python in tornado framework:</p> <pre class="lang-py prettyprint-override"><code>http_client = httpclient.HTTPClient() request = httpclient.HTTPRequest("http://127.0.0.1:8000", method='PUT', body=str("data")) response = http_client.fetch(request) </code></pre> <p>on the other side I have an asynchronous server that I wrote in c++ using cpp-netlib. It basically has to read the request and print its body</p> <pre class="lang-cpp prettyprint-override"><code>class Server; typedef http::async_server&lt;Server&gt; server; class Server { public: void operator()(server::request const &amp; request, server::connection_ptr connection) { boost::shared_ptr&lt;connection_handler&gt; h(new connection_handler()); (*h)(request, connection); server::response_header headers[] = { {"Connection","close"} ,{"Content-Type", "text/plain"} }; connection-&gt;set_headers(boost::make_iterator_range(headers, headers+2)); connection-&gt;set_status(server::connection::accepted); connection-&gt;write("helloworld"); } int main() { Server handler; server::options options(handler); server instance( options.thread_pool(boost::make_shared&lt;utils::thread_pool&gt;(5)) .address("0.0.0.0") .port("8000")); instance.run(); return 0; } </code></pre> <p>and the connection handler looks like this:</p> <pre class="lang-cpp prettyprint-override"><code>struct connection_handler : boost::enable_shared_from_this&lt;connection_handler&gt; { struct read_post_callback { typedef boost::shared_ptr&lt;connection_handler&gt; handler_ptr_t; read_post_callback(handler_ptr_t handler_ptr) : handler(handler_ptr) {} void operator()(server::connection::input_range range, boost::system::error_code error, size_t size, server::connection_ptr conn) { handler-&gt;read_sofar += size; handler-&gt;cond.notify_one(); } handler_ptr_t handler; }; void operator()(server::request const &amp;req, server::connection_ptr conn) { int cl; server::request::headers_container_type const &amp;hs = req.headers; for(server::request::headers_container_type::const_iterator it = hs.begin(); it!=hs.end(); ++it) { if(boost::to_lower_copy(it-&gt;name)=="content-length") { cl = boost::lexical_cast&lt;int&gt;(it-&gt;value); break; } } cout&lt;&lt; req.body &lt;&lt; endl; read_sofar = 0; while(read_sofar&lt;cl) { boost::unique_lock&lt;boost::mutex&gt; lock(mtx); server::connection::read_callback_function cc = read_post_callback(shared_from_this()); conn-&gt;read(cc); cond.wait(lock); } } int read_sofar; boost::condition_variable cond; boost::mutex mtx; }; </code></pre> <p>But request body is always empty and instead of the response I send back ("hello world") most of the time I get something like this (the number could be different)</p> <blockquote> <p>Error: HTTP 0: Unknown</p> </blockquote> <p>Can you tell me why the body is empty or why the response doesn't reach?</p> <p><strong>EDIT:</strong></p> <p>Why the body was empty is in the answer. What I was doing wrong that I wouldn't receive the response was this: I was setting the connection status after setting connection headers in my server. Just swapped their order and it worked like a charm.</p> <pre><code>server::response_header headers[] = { {"Connection","close"} ,{"Content-Type", "text/plain"} }; connection-&gt;set_status(server::connection::accepted); connection-&gt;set_headers(boost::make_iterator_range(headers, headers+2)); connection-&gt;write("helloworld"); </code></pre>
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    1. USsoroosh.strife
    1. USsoroosh.strife
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      1. POsend http request from tornado client to asynchronous cpp-netlib server
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    1. COThere can be problems with `PUT` method in httpclient. Have you tried `POST` instead, just to make sure, that request works?
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      1. USNikolay Fominyh
    2. COyes i have but got the same result
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      1. USsoroosh.strife
 

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