c# - Getting response body on failed request with HttpRequestException -


i trying log failed requests httprequestexception.

my server returns error code and additional json payload @ response body. need access json. how read response body in case of errored request? know actual response not null. it's api , confirm returns json payload 4xx status codes, giving detailed insight error.

how access it? here code:

using (var httpclient = new httpclient()) {     try     {         string resultstring = await httpclient.getstringasync(endpoint);         var result = jsonconvert.deserializeobject<...>(resultstring);         return result;     }     catch (httprequestexception ex)     {         throw ex;     } }

i trying data in throw ex line, couldn't find way.

exactly @frédéric suggested, if use getasync method you'll proper httpresponsemessage object give more information response. details when error occurs can desearlize errors exception or custom exception object response content below:

public static exception createexceptionfromresponseerrors(httpresponsemessage response) {     var httperrorobject = response.content.readasstringasync().result;      // create anonymous object use template deserialization:     var anonymouserrorobject =         new { message = "", modelstate = new dictionary<string, string[]>() };      // deserialize:     var deserializederrorobject =         jsonconvert.deserializeanonymoustype(httperrorobject, anonymouserrorobject);      // wrap exception best fullfills needs of application:     var ex = new exception();      // sometimes, there may model errors:     if (deserializederrorobject.modelstate != null)     {         var errors =             deserializederrorobject.modelstate                                     .select(kvp => string.join(". ", kvp.value));         (int = 0; < errors.count(); i++)         {             // wrap errors base exception.data dictionary:             ex.data.add(i, errors.elementat(i));         }     }     // othertimes, there may not model errors:     else     {         var error =             jsonconvert.deserializeobject<dictionary<string, string>>(httperrorobject);         foreach (var kvp in error)         {             // wrap errors base exception.data dictionary:             ex.data.add(kvp.key, kvp.value);         }     }     return ex; }

usage:

        using (var client = new httpclient())         {             var response =                 await client.getasync("http://localhost:51137/api/account/register");               if (!response.issuccessstatuscode)             {                 // unwrap response , throw api exception:                 var ex = createexceptionfromresponseerrors(response);                 throw ex;             }         }

here's source article detailing more handling httpresponsemessage , it's content.


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