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POC++ boost json ptree parser fail to parse string
 

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  1. POC++ boost json ptree parser fail to parse string
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    <p>i'm trying to send json messages trough boost message_queue using ptree for storing informations localy.</p> <p>this is the code of the receiver:</p> <pre><code>#include &lt;boost/interprocess/ipc/message_queue.hpp&gt; #include &lt;iostream&gt; #include &lt;string&gt; //#include &lt;boost/archive/text_iarchive.hpp&gt; #include &lt;boost/property_tree/ptree.hpp&gt; #include &lt;boost/property_tree/json_parser.hpp&gt; #include &lt;boost/serialization/string.hpp&gt; using boost::interprocess::message_queue; using boost::property_tree::ptree; using boost::property_tree::read_json; #define MAX_SIZE 1000 int main() { message_queue mq (boost::interprocess::open_or_create,"coda",10,MAX_SIZE); message_queue::size_type recv_size; unsigned int priority; ptree pt; std::stringstream iss; std::string serialized_string; serialized_string.resize(MAX_SIZE); mq.receive(&amp;serialized_string[0],MAX_SIZE,recv_size,priority); iss &lt;&lt; serialized_string; std::istringstream is(iss.str()); read_json(is, pt); std::cout pt.get&lt;std::string&gt;("prefix") &lt;&lt; pt.get&lt;std::string&gt;("faceID") &lt;&lt; std::endl; } </code></pre> <p>and this is the code of th sender:</p> <pre><code>#include &lt;boost/interprocess/ipc/message_queue.hpp&gt; #include &lt;boost/serialization/string.hpp&gt; #include &lt;string&gt; #include &lt;sstream&gt; #include &lt;boost/property_tree/ptree.hpp&gt; #include &lt;boost/property_tree/json_parser.hpp&gt; using boost::interprocess::message_queue; using boost::property_tree::ptree; using boost::property_tree::write_json; #define MAX_SIZE 1000 void send(ptree pt) { std::stringstream oss; write_json(oss,pt); std::string serialized_strings(oss.str()); message_queue mq(boost::interprocess::open_only,"coda"); mq.send(serialized_strings.data(), serialized_strings.size(),0); std::cout &lt;&lt; oss.str() &lt;&lt; std::endl; } int main() { ptree pt; pt.put("prefix","standard"); pt.put("faceID",42); send(pt); } </code></pre> <p>the sender works and have this output:</p> <pre><code>$ ./sendptree { "prefix": "standard", "faceID": "42" } </code></pre> <p>the receiver receive the data correctly but fail to parse it (with the read_json call).</p> <pre><code>$ ./recvptree { "prefix": "standard", "faceID": "42" } terminate called after throwing an instance of 'boost::exception_detail::clone_impl&lt;boost::exception_detail::error_info_injector&lt;boost::property_tree::json_parser::json_parser_error&gt; &gt;' what(): &lt;unspecified file&gt;(5): expected end of input [1] 24052 abort ./recvptree </code></pre>
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