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如何使用 nsIWebBrowserPersist 发布数据？

发布于 2024-12-26 02:16:16 字数 99 浏览 0 评论 0原文

我需要使用 nsIWebBrowserPersist 用法下载文件 (saveURI)。但该文件应以 POST 方式请求。怎么做呢？

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明媚殇 2025-01-02 02:16:16

nsIWebBrowserPersist.saveURI() 采用 aPostData 参数 - 如果您传递输入流，则会发出 POST 请求。如果您要发送一些简单的数据，则应使用 nsIStringInputStream最简单的，像这样：

var data = "a=1&b=2";
var stream = Components.classes["@mozilla.org/io/string-input-stream;1"]
                       .createInstance(Components.interfaces.nsIStringInputStream);
stream.setData(data, data.length);
webBrowserPersist.saveURI(uri, null, null, stream, null, file);

nsIWebBrowserPersist.saveURI() takes an aPostData parameter - if you pass an input stream there a POST request will made. If you are sending some simple data, using nsIStringInputStream should be easiest, something like this:

var data = "a=1&b=2";
var stream = Components.classes["@mozilla.org/io/string-input-stream;1"]
                       .createInstance(Components.interfaces.nsIStringInputStream);
stream.setData(data, data.length);
webBrowserPersist.saveURI(uri, null, null, stream, null, file);

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撧情箌佬 2025-01-02 02:16:16

这是工作代码（感谢 IRC #extdev 的 BenB）：

    var dataString = "name1=data1&name2=data2";  
    var stringStream = Components.classes["@mozilla.org/io/string-input-stream;1"].  
                       createInstance(Components.interfaces.nsIStringInputStream);  
    if ("data" in stringStream) // Gecko 1.9 or newer  
      stringStream.data = dataString;  
    else // 1.8 or older  
      stringStream.setData(dataString, dataString.length);  

    var postData = Components.classes["@mozilla.org/network/mime-input-stream;1"].  
                   createInstance(Components.interfaces.nsIMIMEInputStream);  
    postData.addHeader("Content-Type", "application/x-www-form-urlencoded");  
    postData.addContentLength = true;  
    postData.setData(stringStream);   

    persist.saveURI(fURI, null, aReferrer, postData, "", file);

https://developer. mozilla.org/en/Code_snippets/Post_data_to_window#Preprocessing_POST_data

Here is the working code (thanks to BenB from IRC #extdev):

    var dataString = "name1=data1&name2=data2";  
    var stringStream = Components.classes["@mozilla.org/io/string-input-stream;1"].  
                       createInstance(Components.interfaces.nsIStringInputStream);  
    if ("data" in stringStream) // Gecko 1.9 or newer  
      stringStream.data = dataString;  
    else // 1.8 or older  
      stringStream.setData(dataString, dataString.length);  

    var postData = Components.classes["@mozilla.org/network/mime-input-stream;1"].  
                   createInstance(Components.interfaces.nsIMIMEInputStream);  
    postData.addHeader("Content-Type", "application/x-www-form-urlencoded");  
    postData.addContentLength = true;  
    postData.setData(stringStream);   

    persist.saveURI(fURI, null, aReferrer, postData, "", file);

https://developer.mozilla.org/en/Code_snippets/Post_data_to_window#Preprocessing_POST_data

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