Google Data API 体验

用了live writer之后，很想要一个同步blog的功能，可惜没实现，还要一个一个的提交。决定自己动手，于是看了下 Google 提供的 Blogger 的 Google Data API，比较了几个版本的实现，最终决定使用.Net版本的，Java的就是看着不爽（嘿嘿）。

下载了安装包，编译源码和示例工程，一切正常。运行，异常（汗……）。

自己跟了一下代码，几经周折，才发现原来是访问不到。于是改成使用代理，搜了半天，最终还是根据源码的实现加了进去：

GDataRequestFactory requestFactory = (GDataRequestFactory)service.RequestFactory;

WebProxy torProxy = new WebProxy("127.0.0.1", 8118);

torProxy.Credentials = CredentialCache.DefaultCredentials;

torProxy.UseDefaultCredentials = true;

requestFactory.Proxy = torProxy;

原以为应该没问题，结果运行，还是异常，

---------------------------
断言失败: Abort=Quit、Retry=Debug、Ignore=Continue
---------------------------
did not find an auth token in QueryAuthToken

    at Tracing.Assert(Boolean condition, String msg)  D:/Program Files/Google/Google Data API SDK/Sources/Library/core/tracing.cs(209)

    at GDataGAuthRequest.QueryAuthToken(GDataCredentials gc)  D:/Program Files/Google/Google Data API SDK/Sources/Library/core/gauthrequest.cs(606)

    at GDataGAuthRequest.EnsureCredentials()  D:/Program Files/Google/Google Data API SDK/Sources/Library/core/gauthrequest.cs(422)

    at GDataRequest.EnsureWebRequest()  D:/Program Files/Google/Google Data API SDK/Sources/Library/core/request.cs(648)

    at GDataGAuthRequest.EnsureWebRequest()  D:/Program Files/Google/Google Data API SDK/Sources/Library/core/gauthrequest.cs(456)

    at GDataRequest.Execute()  D:/Program Files/Google/Google Data API SDK/Sources/Library/core/request.cs(696)

    at GDataGAuthRequest.Execute(Int32 retryCounter)  D:/Program Files/Google/Google Data API SDK/Sources/Library/core/gauthrequest.cs(701)

    at GDataGAuthRequest.Execute()  D:/Program Files/Google/Google Data API SDK/Sources/Library/core/gauthrequest.cs(684)

    at Service.Query(Uri queryUri, DateTime ifModifiedSince, String etag, Int64& contentLength)  D:/Program Files/Google/Google Data API SDK/Sources/Library/core/service.cs(403)

    at Service.Query(Uri queryUri, DateTime ifModifiedSince)  D:/Program Files/Google/Google Data API SDK/Sources/Library/core/service.cs(347)

    at Service.Query(FeedQuery feedQuery)  D:/Program Files/Google/Google Data API SDK/Sources/Library/core/service.cs(478)

    at BloggerService.Query(BloggerQuery feedQuery)  D:/Program Files/Google/Google Data API SDK/Sources/Library/blogger/bloggerservice.cs(50)

    at Blogger.RefreshFeedList()  D:/Program Files/Google/Google Data API SDK/Sources/Samples/blogger/blogger.cs(244)

    at Blogger.Go_Click(Object sender, EventArgs e)  D:/Program Files/Google/Google Data API SDK/Sources/Samples/blogger/blogger.cs(204)

    at Control.OnClick(EventArgs e) 

    at Button.OnClick(EventArgs e) 

    at Button.OnMouseUp(MouseEventArgs mevent) 

    at Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) 

    at Control.WndProc(Message& m) 

    at ButtonBase.WndProc(Message& m) 

    at Button.WndProc(Message& m) 

    at ControlNativeWindow.OnMessage(Message& m) 

    at ControlNativeWindow.WndProc(Message& m) 

    at NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) 

    at UnsafeNativeMethods.DispatchMessageW(MSG& msg) 

    at ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData) 

    at ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context) 

    at ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context) 

    at Application.Run(Form mainForm) 

    at Blogger.Main()  D:/Program Files/Google/Google Data API SDK/Sources/Samples/blogger/blogger.cs(56)

    at AppDomain._nExecuteAssembly(Assembly assembly, String[] args) 

    at AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) 

    at HostProc.RunUsersAssembly() 

    at ThreadHelper.ThreadStart_Context(Object state) 

    at ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) 

    at ThreadHelper.ThreadStart() 

---------------------------
终止(A)   重试(R)   忽略(I)  
---------------------------

难道权限的输入有问题，几番查找资料，仔细核对文档，比较结果还是没问题。用户名，密码都是正确的。看来只有仔细跟代码了，仔细调试下，终于找到了异常位置 ：

 

public static class GoogleAuthentication

{

…

internal string QueryAuthToken(GDataCredentials gc)

{

…

Stream requestStream = authRequest.GetRequestStream() ;

 

协议冲突，难道用了非blogger的协议，再看，恩 Service service = new Service("blogger", "BloggerSampleApp"); 直接换 BloggerService service = new BloggerService("BloggerSampleApp"); 还是不行。分析了半天，忽然想到用Live Writer的时候也有问题，这么说可能是http协议头冲突造成的。于是增加 config 文件

 
   
     
   
 

 

再运行，一切ok。终于解脱了。O(∩_∩)O哈哈~