Use Java httpcomponent/httpclinet to invoke Webapi problem resolution

Several key words:

WebAPI, Android, Apache httpcomponent/httpclient

Problem: No matter how the test, Webapi formbody value is always empty.

The simplest code WebAPI, no authentication

1 //POST api/<controller>2 [HttpPost]3  Public stringPost ([Frombody]stringvalue)4 {5     stringval =value;6 7 Debug.WriteLine (value);8 9     returnvalue;Ten}

The simplest code, Java side, with Stringentity

1      Public Static voidNotauthtestpost ()throwsIOException {2Closeablehttpclient httpclient =Httpclients.createdefault ();3         Try {4HttpPost HP =NewHttpPost ("Http://localhost:8888/api/test");5             6String str= "{' Header ': [{' Summary ': 111, ' Endtime ': 570, ' end_date ': 1431381600, ' resid ': ' sc20150512034635 ', ' starttime ' ': 570, ' ScheduleID ': ' sc155485e5025f3d ', ' machid ': ' sc155485e8044b93 ', ' parentid ': null, ' start_date ': 1431381600}], ' Detail ': [{' perm_modify ': 1, ' owner ': 1, ' perm_delete ': 1, ' resid ': ' sc20150512034635 ', ' MemberID ': ' sc1555070e4d8217 ', ' Invited ': 0},{' perm_modify ': 0, ' owner ': 0, ' Perm_delete ': 0, ' resid ': ' sc20150512034635 ', ' MemberID ': ' Sc155489a07e0e24 ', ' Invited ': 1}]} ";7 8Stringentity SE =NewStringentity (str, contenttype.create ("Application/json", "UTF-8"));9 hp.setentity (SE);Ten  One System.out.println (entityutils.tostring (SE)); A  -Closeablehttpresponse response1 =NULL; -             Try { theResponse1 =Httpclient.execute (HP); -  - System.out.println (Response1.getstatusline ()); -Httpentity entity1 =response1.getentity (); +  -                 //Do something useful with the response body +                 //and ensure it is fully consumed A                 //Entityutils.consume (entity1); at  -String Jsonstr =entityutils.tostring (entity1); -  - System.out.println (JSONSTR); -  -}Catch(clientprotocolexception e) { in e.printstacktrace (); -}Catch(IOException e) { to e.printstacktrace (); +}finally { - response1.close (); the             } *  $}finally {Panax Notoginseng httpclient.close (); -         } the}

Results:

But the same JSON, using C # httpclient, is perfectly fine.

Care about a bit fiddle capture chart:

Use C # HttpClient: (value can be taken)

Use Java Apache HttpClient (value not to be taken)

Compare to find, in raw view, can see, HttpRequest body is different. is a pair of quotation marks. "".

So add a line to the Java code:

str = "\" "+str +" \ "";

The Webapi end is normal to get value.

It is estimated that there is a deeper solution, so let's take a note.

Use Java httpcomponent/httpclinet to invoke Webapi problem resolution