How to pass long string in HttpClient.PostAsync request

Question

Trying to send a rather long string to a REST web api (youtrack). I get the following exception:

Invalid URI: The Uri string is too long.

My code:

var encodedMessage = HttpUtility.UrlEncode(message);
var requestUri = string.Format("{0}{1}issue/{2}/execute?comment={3}", url, YoutrackRestUrl, issue.Id, encodedMessage);
var response = await httpClient.PostAsync(requestUri, null).ConfigureAwait(false);

So I took my chances with a FormUrlEncodedContent

var requestUri = string.Format("{0}{1}issue/{2}/execute", url, YoutrackRestUrl, issue.Id);

var postData = new List<KeyValuePair<string, string>>();
postData.Add(new KeyValuePair<string, string>("comment", message));

var content = new FormUrlEncodedContent(postData);
var response = await httpClient.PostAsync(requestUri, content).ConfigureAwait(false);

Which results in the exact same issue.

The string (comment) I am sending, is the changed file set of a commit into SVN. Which can be really long, so I don't really have a way to get around that. Is there a way to post content without the string length restriction?

Read the following topics, but didn't find an answer there:

is the behaviour the same if You're only posting like 1 character in your message ? — Marty
– Marty, Commented Jan 27, 2016 at 20:15
It might be that you Youtrack api has a limmit on the 'comment' field. What does their API documentation say about that ? if there's a restriction on the comment property/field - then - not much You can do about it except than shorten it... — Marty
– Marty, Commented Jan 27, 2016 at 20:17
according to their docs: no limit. the exception occurs on the line "var content = new FormUrlEncodedContent(postData);" — bas
– bas, Commented Jan 27, 2016 at 20:57
@Marty works fine with 1 char, or 2000 for that matter. only goes wrong for 65000+ messages — bas
– bas, Commented Jan 27, 2016 at 20:58
Could it be an issue with FormUrlEncodedContent class? Have a look at this answer stackoverflow.com/a/23740338/189738 — adeel41
– adeel41, Commented Jan 27, 2016 at 21:07

Community · Accepted Answer · 2017-05-23 11:53:40Z

2

Well the short answer to it - just put it into the Body, instead of trying to push all the data via the URL

But as the work on the ticket showed - the answer was here How to set large string inside HttpContent when using HttpClient?

The actual problem beeing in the FormUrlEncodedContent

edited May 23, 2017 at 11:53

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answered Jan 27, 2016 at 20:12

Marty

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1 Comment

rene Over a year ago

That is what second example does, isn't it?

Manikandan · Accepted Answer · 2017-01-02 11:04:35Z

0

Try this..Will be helpful for uwp..

 Uri uri = new Uri("your uri string");
 Windows.Web.Http.HttpClient client = new Windows.Web.Http.HttpClient();
 var value1 = new System.Collections.Generic.List<System.Collections.Generic.KeyValuePair<string,string>>
 { 
     // your key value pairs
 };

 var response = await client.PostAsync(uri,new HttpFormUrlEncodedContent(value1));
 var result = await response.Content.ReadAsStringAsync();

answered Jan 2, 2017 at 11:04

Manikandan

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1 Comment

gumuruh Over a year ago

i am doing this keyvalue things... but still uri is still too long...

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