Unity3D - 将自定义标头添加到 WWWForm

这是我运行的 C# 代码：

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"]);

如上所示，我尝试添加Authorization and Host字段添加到标题，然后为它们分配值以确保确定。然而Unity3D抛出一个错误formData.headers ["Authorization"]每次。

这是错误消息：

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)

The WWWForm.headers https://docs.unity3d.com/ScriptReference/WWWForm-headers.html变量是只读的。当您致电Add函数，它并没有真正添加任何东西。这就是您收到该错误的原因，因为数据未添加到WWWForm.headers https://docs.unity3d.com/ScriptReference/WWWForm-headers.html.

Unity's WWW最近班级变了。要添加标题，您必须创建字典然后传递它Dictionary到第三个参数WWW构造函数。

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

像这样的事情：

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);

如果您有要发布的表格，您可以使用以下组合WWWForm and Dictionary要做到这一点。只需转换WWWForm阵列与WWWForm.data https://docs.unity3d.com/ScriptReference/WWWForm-data.html然后将其传递给第二个参数WWW构造函数。

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);