Constructing multipart response

Question

Given the reposne of multiple HTTP request, I have to build a multipart response out of them. The problem I am faing is how to set the response headers of individual response in the final multipart response. For. eg.

HttpClient client = new HttpClient();
HttpRequestMessage request1 = new HttpRequestMessage(HttpMethod.Get, "http://www.xyx/Service.svc/resource1");
HttpResponseMessage response1 = client.SendAsync(request).Result;

HttpRequestMessage request2 = new HttpRequestMessage(HttpMethod.Get, "http://www.xyx/Service.svc/resource2");
HttpResponseMessage response2 = client.SendAsync(request).Result;

MultipartContent content = new MultipartContent("mixed", "----Boundary");
content.Add(response1.Content);
content.Add(response2.Content);

The response I am getting from it is like:

------Boundary
Content-Length: 99427
Content-Type: application/json; charset=utf-8
Last-Modified: Mon, 20 Jan 2014 06:15:50 GMT

{"DebugInfo":null}
------Boundary
Content-Length: 99427
Content-Type: application/json; charset=utf-8
Last-Modified: Mon, 20 Jan 2014 06:15:50 GMT

{"DebugInfo":null}
------Boundary--

Now I want to include the reposne header of each request as part of individual response as well in the final response, and it should look like

HTTP/1.1 200 OK
Content-Type: multipart/mixed; boundary=batch_pK7JBAk73-E=_AA5eFwv4m2Q=
Date: Tue, 22 Jan 2013 18:56:00 GMT
Expires: Tue, 22 Jan 2013 18:56:00 GMT
Cache-Control: private, max-age=0
Content-Length: 1972

--batch_pK7JBAk73-E=_AA5eFwv4m2Q=
Content-Type: application/http
Content-ID: <response-8a09ca85-8d1d-4f45-9eb0-da8e8b07ec83+1>

HTTP/1.1 200 OK
ETag: "lGaP-E0memYDumK16YuUDM_6Gf0/V43j6azD55CPRGb9b6uytDYl61Y"
Content-Type: application/json; charset=UTF-8
Date: Tue, 22 Jan 2013 18:56:00 GMT
Expires: Tue, 22 Jan 2013 18:56:00 GMT
Cache-Control: private, max-age=0
Content-Length: 247

{
 "kind": "storage#objectAccessControl",
 "id": "example-bucket/obj1/allUsers",
 "selfLink": "https://www.googleapis.com/storage/v1beta2/b/example-bucket/o/obj1/acl/allUsers",
 "bucket": "example-bucket",
 "object": "obj1",
 "entity": "allUsers",
 "role": "READER"
}

--batch_pK7JBAk73-E=_AA5eFwv4m2Q=
Content-Type: application/http
Content-ID: 

HTTP/1.1 200 OK
ETag: "lGaP-E0memYDumK16YuUDM_6Gf0/91POdd-sxSAkJnS8Dm7wMxBSDKk"
Content-Type: application/json; charset=UTF-8
Date: Tue, 22 Jan 2013 18:56:00 GMT
Expires: Tue, 22 Jan 2013 18:56:00 GMT
Cache-Control: private, max-age=0
Content-Length: 247

{
 "kind": "storage#objectAccessControl",
 "id": "example-bucket/obj2/allUsers",
 "selfLink": "https://www.googleapis.com/storage/v1beta2/b/example-bucket/o/obj2/acl/allUsers",
 "bucket": "example-bucket",
 "object": "obj2",
 "entity": "allUsers",
 "role": "READER"
}

--batch_pK7JBAk73-E=_AA5eFwv4m2Q=
Content-Type: application/http
Content-ID: 

HTTP/1.1 200 OK
ETag: "lGaP-E0memYDumK16YuUDM_6Gf0/d2Z1F1_ZVbB1dC0YKM9rX5VAgIQ"
Content-Type: application/json; charset=UTF-8
Date: Tue, 22 Jan 2013 18:56:00 GMT
Expires: Tue, 22 Jan 2013 18:56:00 GMT
Cache-Control: private, max-age=0
Content-Length: 247

{
 "kind": "storage#objectAccessControl",
 "id": "example-bucket/obj3/allUsers",
 "selfLink": "https://www.googleapis.com/storage/v1beta2/b/example-bucket/o/obj3/acl/allUsers",
 "bucket": "example-bucket",
 "object": "obj3",
 "entity": "allUsers",
 "role": "READER"
}

--batch_pK7JBAk73-E=_AA5eFwv4m2Q=--

Does anyone know how to add them in MultipartContent in C#?

How can we read multipart/mixed content, similar to your second example, from HttpResponseMessage object? — Sumant Kumar Mandal
– Sumant Kumar Mandal, Commented Jan 18, 2024 at 7:28

Ravi Gupta · Accepted Answer · 2014-01-21 13:33:44Z

4

Got it. You can also add complete response to a MultipartContent as well.

MultipartContent content = new MultipartContent("mixed", "----Boundary");
content.Add(new HttpMessageContext(response1));
content.Add(new HttpMessageContext(response2));

answered Jan 21, 2014 at 13:33

Ravi Gupta

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Sumant Kumar Mandal Over a year ago

How can we read multipart/mixed content, similar to your second example, from HttpResponseMessage object?

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