Unity3D-将自定义标头添加到WWWForm

Question

Here is the C# Code I ran:

WWWForm formData = new WWWForm ();

//Adding
formData.headers.Add ("Authorization", "Basic " + System.Convert.ToBase64String(Encoding.UTF8.GetBytes(CONSUMER_KEY + ":" + CONSUMER_SECRET)));
formData.headers.Add ("Host", "api.twitter.com");

//Assigning
formData.headers ["Host"] = "api.twitter.com";
formData.headers ["Authorization"] = "Basic " + System.Convert.ToBase64String (Encoding.UTF8.GetBytes (CONSUMER_KEY + ":" + CONSUMER_SECRET));

Debug.Log (formData.headers ["Authorization"]);

As shown above, I tried to add Authorization and Host fields to the header and then Assigning them values just to be sure. However Unity3D throws a Error on formData.headers ["Authorization"] everytime.

Here is the Error Message:

KeyNotFoundException: The given key was not present in the dictionary.
System.Collections.Generic.Dictionary`2[System.String,System.String].get_Item (System.String key) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Collections.Generic/Dictionary.cs:150)
Information+Twitter.GetToken () (at Assets/Static Libraries/Information.cs:143)
Information.Initialize () (at Assets/Static Libraries/Information.cs:18)
WorldScript.Awake () (at Assets/WorldScript.cs:16)

Answer 1

The WWWForm.headers variable is read only. When you call the Add function, it's not really adding anything. That's why you are getting that error because the data is not added to the WWWForm.headers .

Unity's WWW class changed recently. To add headers, you have to create Dictionary then pass that Dictionary to the third parameter of the WWW constructor.

public WWW(string url, byte[] postData, Dictionary<string, string> headers);

Something like this:

Dictionary<string, string> headers = new Dictionary<string, string>();
headers.Add("User-Agent", "Mozilla / 5.0(Windows NT 10.0; WOW64) AppleWebKit / 537.36(KHTML, like Gecko) Chrome / 55.0.2883.87 Safari / 537.36");

WWW www = new WWW("http://www.thismachine.info/", null, headers);
yield return www;
Debug.Log(www.text);

---

If you have form to post, you can use a combination of WWWForm and Dictionary to do that. Just convert the WWWForm to array with WWWForm.data then pass it to the second parameter of the WWW constructor.

Dictionary<string, string> headers = new Dictionary<string, string>();
headers.Add("User-Agent", "Mozilla / 5.0(Windows NT 10.0; WOW64) AppleWebKit / 537.36(KHTML, like Gecko) Chrome / 55.0.2883.87 Safari / 537.36");

WWWForm formData = new WWWForm();
formData.AddField("UserName", "Programmer");
formData.AddField("Password", "ProgrammerPass");

WWW www = new WWW("http://www.thismachine.info/", formData.data, headers);
yield return www;
Debug.Log(www.text);