c# - HttpWebRequest Response Stream only returns 64k of data -


we're using web api provide restful service our application, @ moment using wpf , requires service client.

the problem we're having when response size exceeds 64k, underlying stream stops @ 64k , throws exception if more data requested, despite fact contentlength greater (in test case ~125k)

here our method calls service:

private httpwebresponse callservicemethod<tdto>(uri serviceurl, string method, out webexception requestexceptiondetail, tdto dto = null) tdto : dtobase {   httpwebrequest request;   httpwebresponse response;   encoding enc;   string encodeddto;   byte[] encodeddtoarray;   stream writestream;    request = webrequest.createhttp(serviceurl);   request.method = method;    if (dto != null)   {     enc = utf8encoding.default;     encodeddto = string.concat("=", jsonconvert.serializeobject(dto));     encodeddtoarray = enc.getbytes(encodeddto);      request.contentlength = encodeddtoarray.length;     request.contenttype = "application/x-www-form-urlencoded";      writestream = request.getrequeststream();     writestream.write(encodeddtoarray, 0, encodeddtoarray.length);     writestream.close();   }    requestexceptiondetail = null;    try   {     response = (httpwebresponse)request.getresponse();   }   catch (webexception wex)   {     response = (httpwebresponse)wex.response;     requestexceptiondetail = wex;   }    return response; }

...and here's method decodes response, glue logic in between passes response through.

private tobjecttype decoderesponse<tobjecttype>(httpwebresponse webresponse) {   encoding enc;   streamreader responsereader;   string responsetext;   tobjecttype retval;    // obtain string underlying response string   enc = utf8encoding.default;   responsereader = new streamreader(webresponse.getresponsestream(), enc);   responsetext = responsereader.readtoend();    // use json deserialise string   retval = jsonconvert.deserializeobject<tobjecttype>(responsetext);    return retval; }

we have tried sort of thing, no avail:

private tobjecttype decoderesponse<tobjecttype>(httpwebresponse webresponse) {   encoding enc;   streamreader responsereader;   string responsetext;   tobjecttype retval;   char[] buffer;   int buffersize, startpos, totallength, readlength;   stringbuilder sbx;    // obtain string underlying response string   enc = utf8encoding.default;   responsereader = new streamreader(webresponse.getresponsestream(), enc);    totallength = (int)webresponse.contentlength;   buffersize = 65536;   startpos = 0;   buffer = new char[buffersize];    sbx = new stringbuilder(totallength);   //webresponse.getresponsestream().    while (startpos < totallength)   {     readlength = math.min(buffersize, totallength - startpos);     responsereader.read(buffer, startpos, readlength);     sbx.append(buffer, 0, readlength);      startpos += readlength;   }    //responsetext = responsereader.readtoend();   responsetext = sbx.tostring();    // use json deserialise string   retval = jsonconvert.deserializeobject<tobjecttype>(responsetext);    return retval; }

any appreciated ;-)

further investigation revealed httpwebrequest has static property called defaultmaximumerrorresponselength set default 65536.

it conspire .net framework includes fiendish property works long response text/plain, if requires closure - such xml or json - breaks.

for needs more information, please refer to:


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