ios - Uploading GPX file to Strava API with GTMHTTPFetcher POST in Objective-c -

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after exploring use of strava api (http://strava.github.io/api/v3) gtmhttpfetcher 2 days stuck @ uploading .gpx file account made decision ask answer here. received , stored access token necessary 'view_private,write' permission , server responding requests , managed receive , change data stored in account. when trying upload .gpx (xml) file error (bad request):

the operation couldn’t completed. (com.google.httpstatus error 400.)

there don't understand constructing http post request apparently , tried different approaches experimenting values in http header, changed fetch url after '/uploads?' file=... etc. no avail. authentication use gtmoauth2authentication.

my code:

- (void) uploadtostrava {      nsstring *filepath = @"somefilepath.gpx";     nsurl *url = [nsurl urlwithstring:@"https://www.strava.com/api/v3/uploads?data_type=gpx"];     nsmutableurlrequest *request = [nsmutableurlrequest requestwithurl:url];      [request sethttpmethod:@"post"];     [request sethttpbody:[nsdata datawithcontentsoffile:filepath]];      [self.signedstravaauth authorizerequest:request];      gtmhttpfetcher* mystravafetcher = [gtmhttpfetcher fetcherwithrequest:request];     [mystravafetcher beginfetchwithdelegate:self                           didfinishselector:@selector(mystravafetcher:finishedwithdata:error:)];     self.currentfetcher = mystravafetcher;  }  - (void) mystravafetcher:(gtmhttpfetcher *)fetcher finishedwithdata:(nsdata *)data error:(nserror *) error {     if (error != nil) {         [self handleerrorwithtext:nil];         nslog(@"error %@", [error localizeddescription]);     } else {         nsstring *info = [[nsstring alloc] initwithdata:data encoding:nsasciistringencoding];         nsdictionary *result = [self.jsonparser objectwithstring:info];         nslog(@"strava response: %@", result);     } }

the api docs come following example request in curl:

$ curl -x post https://www.strava.com/api/v3/uploads \     -h "authorization: bearer 83ebeabdec09f6670863766f792ead24d61fe3f9" \     -f activity_type=ride \     -f file=@test.fit \     -f data_type=fit

related question: using afnetworking post file asynchronously upload progress strava v3 api

if receiving http 400 means strava v3 api rejecting request - 400s uploads endpoint include information in response wrong. start examining response body error response. i'm not familiar gtmhttpfetcher, should either able debug , observe response body or can use tool charles proxy debug request , response. try comparing curl request , request coming objective-c code.

the strava v3 uploads api expects file portion of upload in file parameter - again, without being familiar gtmhttpfetcher can't sure doing, doesn't seem specifying file data part of multipart/form-data section called file.

a long-shot: seems mixing post body , query string parameters, data_type parameter might not making through. i'd consistent , put params in post body.


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