post - Java server cannot parseFrom protobuf byte[] -

post - Java server cannot parseFrom protobuf byte[] -

i utilize libcurl c++ client in order submit post info java server. reason, post info (protobuf serializetostring) cannot parsed on server side.

here client side part:

string str; protobufmessage.serializetostring(&str); curl_easy_setopt(m_curl_handle, curlopt_postfields, str); curl_easy_setopt(m_curl_handle, curlopt_postfieldsize, str.size());

and here java code on server:

@produces(mediatype.application_octet_stream) @consumes(mediatype.application_octet_stream) public @responsebody byte[] updatestatus( @requestbody byte[] message) { seek { protobufmessage pbmessage = protobufmessage.parsefrom(message); ... }

when convert message string, next value - "%c3%b4%c3%ba%29%00%00%00%00%00%c3%bd%c3%bd%c3%bd%c3%bd%c2%ab%c2%ab%c2%ab%c2%ab%c2%ab%c2%ab="

however, client sending next value - "\b\x1\x1a\xe\n\x5hello\x12\x5world"

i believe somehow related encoding of transmitted bytes, how can command it?

also, here exception i'm getting on server side, while parsing message - com.google.protobuf.invalidprotocolbufferexception: protocol message end-group tag did not match expected tag.

according this documentation, parameter curlopt_postfields needs char*. you're passing std::string. don't compile error because curl_easy_setopt c-style vararg function, has no type checking.

change line to:

curl_easy_setopt(m_curl_handle, curlopt_postfields, str.data());

an additional possible problem here libcurl send request content-type: application/x-www-form-urlencoded. many web servers recognize type , effort parse form data. should override content-type application/x-protobuf or maybe application/octet-stream (which means "byte blob") avoid problems.

java post encoding protocol-buffers libcurl