TL;DR -- How do I send a JSON string to a REST host with an auth header? I've tried 3 different approaches found one that works with anonymous types. Why can't I use anonymous types? I need to set a variable called "Group-Name", and a hyphen isn't a valid C# identifier.
Background
I need to POST JSON but am unable to get the body and the content type correct
Function #1 - Works with anonymous types
The content type and data is correct, but I don't want to use anonymous types. I want to use a string
static void PostData(string restURLBase, string RESTUrl, string AuthToken, string postBody)
{
HttpClient client = new HttpClient();
client.BaseAddress = new Uri(restURLBase);
client.DefaultRequestHeaders.Add("Auth-Token", AuthToken);
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
// StringContent content = new StringContent(postBody);
var test1 = "data1";
var test2 = "data2";
var test3 = "data3";
var response = client.PostAsJsonAsync(RESTUrl, new { test1, test2, test3}).Result; // Blocking call!
if (!response.IsSuccessStatusCode)
{
Console.WriteLine("{0} ({1})", (int)response.StatusCode, response.ReasonPhrase);
return;
}
}
Output #1
Content type and data is correct when using AnonymousTypes + PostAsJsonAsync, but I don't want to use anonymous types.
POST https://api.dynect.net/REST/Zone/ABCqqqqqqqqqqqqYYYYYtes3ss.com HTTP/1.1
Auth-Token: --- REDACTED -----
Accept: application/json
Content-Type: application/json; charset=utf-8
Host: api.dynect.net
Content-Length: 49
Expect: 100-continue
{"test1":"data1","test2":"data2","test3":"data3"}
Function #2 - Doesn't work as expected
Take a string and put it into a StringContent object. This has a side effect of changing the content type.
static void PostData(string restURLBase, string RESTUrl, string AuthToken, string postBody)
{
HttpClient client = new HttpClient();
client.BaseAddress = new Uri(restURLBase);
client.DefaultRequestHeaders.Add("Auth-Token", AuthToken);
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
StringContent content = new StringContent(postBody);
var response = client.PostAsync(RESTUrl, content).Result; // Blocking call!
if (!response.IsSuccessStatusCode)
{
Console.WriteLine("{0} ({1})", (int)response.StatusCode, response.ReasonPhrase);
return;
}
}
Output #2
Content type is wrong when using StringContent + PostAsync
POST https://api.dynect.net/REST/Zone/ABCqqqqqqqqqqqqYYYYYtes3ss.com HTTP/1.1
Auth-Token: ---- REDACTED -------
Accept: application/json // CORRECT
Content-Type: text/plain; charset=utf-8 // WRONG!!!
Host: api.dynect.net
Content-Length: 100
Expect: 100-continue
{"rdata" : ["rname" : "dynect.nfp.com", "zone" : "ABCqqqqqqqqqqqqYYYYYtes3ss.com"], "ttl" : "43200"}
// ^^ THIS IS CORRECT
Function #3 - Doesn't work as expected
Since I know PostAsJsonAsync
sets the contentType correctly, lets use that method. (doesn't work)
static void PostData(string restURLBase, string RESTUrl, string AuthToken, string postBody)
{
HttpClient client = new HttpClient();
client.BaseAddress = new Uri(restURLBase);
client.DefaultRequestHeaders.Add("Auth-Token", AuthToken);
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
StringContent content = new StringContent(postBody);
var response = client.PostAsJsonAsync(RESTUrl, content).Result; // Blocking call!
if (!response.IsSuccessStatusCode)
{
Console.WriteLine("{0} ({1})", (int)response.StatusCode, response.ReasonPhrase);
return;
}
}
Output #3
Content type is correct, POST body is wrong when using StringContent + PostAsJsonAsync
POST https://api.dynect.net/REST/Zone/ABCqqqqqqqqqqqqYYYYYtes3ss.com HTTP/1.1
Auth-Token: -- REDACTED ---
Accept: application/json
Content-Type: application/json; charset=utf-8
Host: api.dynect.net
Content-Length: 74
Expect: 100-continue
{"Headers":[{"Key":"Content-Type","Value":["text/plain; charset=utf-8"]}]}
Question
All I want to do is send JSON as a string, or dynamic object defined at runtime, to a server, with HTTP content type correct, and with a special 'Auth-Token' header.
Any example, if not using WebAPI, such as servicestack, or anything else is cool.
/// <summary>
/// Creates a new instance of the <see cref="T:System.Net.Http.StringContent"/> class.
/// </summary>
/// <param name="content">The content used to initialize the <see cref="T:System.Net.Http.StringContent"/>.</param><param name="encoding">The encoding to use for the content.</param><param name="mediaType">The media type to use for the content.</param>
[__DynamicallyInvokable]
public StringContent(string content, Encoding encoding, string mediaType)
: base(StringContent.GetContentByteArray(content, encoding))
{
this.Headers.ContentType = new MediaTypeHeaderValue(mediaType == null ? "text/plain" : mediaType)
{
CharSet = encoding == null ? HttpContent.DefaultStringEncoding.WebName : encoding.WebName
};
}
It's constructor of StringContent. Looks like that you should specify appropriate Encoding and mediaType
You can't directly setup an instance of HttpContent, because it is an abstract class. You need to use one of the sub-classes, depending on your need. Most likely StringContent, which lets you set the string value of the response, the encoding, and the media type in the constructor: http://msdn.microsoft.com/en-us/library/system.net.http.stringcontent.aspx
Answer from How do I set up HttpContent for my HttpClient PostAsync second parameter?
来源:https://stackoverflow.com/questions/21057354/how-do-i-send-arbitrary-json-data-with-a-custom-header-to-a-rest-server