停止逃离字符串的webclient [英] Stop webclient from escaping strings

问题描述

我想使用Google Maps API来进行地理编码/反向地理编码坐标/地址。为此，我使用了C＃的webclient类实例。

  static string gMapsUrl =http：//maps.googleapis。 com / maps / api / geocode / xml？address = {0}& sensor = false; 
 public static List< Location> RetrieveCoordinate（string address）
 {
 string requestUri = string.Format（gMapsUrl，address）; 
 string result = string.Empty; 
 
使用（var client = new WebClient（））
 {
 client.Encoding = System.Text.Encoding.UTF8; 
 result = client.DownloadString（requestUri）; 
} 
 .... 
} 
  

这通常适用，但是可以说我想对地址Götznerstraße进行反向地理编码。如果我在浏览器中手动执行此操作，则一切正常，请求的URL将为

  http：// maps。 googleapis.com/maps/api/geocode/xml?address=götznerstraße&sensor=false
  

最终的请求从我的程序看起来像这样

  GET / maps / api / geocode / xml？address = G％C3％B6tznerstra％ C3％9Fe& sensor = false HTTP / 1.1 
  

这会导致Google找不到匹配项。对我来说，看起来好像webclient在某个地方逃跑了，这阻止了我获得结果。有没有办法停止这样做的webclient，或让谷歌unescape字符串再次？

编辑：
我解决了它，比较来自浏览器和我的程序，我意识到我的浏览器正在发送一些额外的头文件。更改的实现如下所示：

  using（var client = new WebClient（））
 {
 client .Headers.Add（Accept，text / html，application / xhtml + xml，application / xml; q = 0.9，image / webp，* / *; q = 0.8）; 
 client.Headers.Add（Accept-Encoding，gzip，deflate，sdch）; 
 client.Headers.Add（Accept-Language，de-DE，de; q = 0.8，en-US; q = 0.6，en; q = 0.4）; 
 client.Encoding = System.Text.Encoding.UTF8; 
 result = client.DownloadString（requestUri）; 
} 
  

非常感谢所有帮助过我的人！

解决方案

它必须转义url。然而，没有什么能够阻止你使用 HttpUtility.UrlDecode 来隐藏它。
也可以看看这里获取更深入的答案。

I want to use the Google Maps API to geocode/reverse-geocode coordinates/addresses. To do this, I use an instance of C#'s webclient class.

static string gMapsUrl= "http://maps.googleapis.com/maps/api/geocode/xml?address=  {0}&sensor=false";
public static List<Location> RetrieveCoordinate(string address)
{
    string requestUri = string.Format(gMapsUrl, address);
    string result = string.Empty;

    using (var client = new WebClient())
    {
        client.Encoding = System.Text.Encoding.UTF8;
        result = client.DownloadString(requestUri);
    }
....
}

This usually works, however lets say I want to reverse-geocode the address "Götznerstraße". If I do this manually in a browser, everything works fine, the URL of the request would be

http://maps.googleapis.com/maps/api/geocode/xml?address=götznerstraße&sensor=false

The eventual request from my program however looks like this

GET /maps/api/geocode/xml?address=G%C3%B6tznerstra%C3%9Fe&sensor=false HTTP/1.1 

This leads to Google finding no matches. To me it appears as if the webclient escapes the umlaute somewhere, which prevents me from getting results. Is there a way to stop the webclient from doing this, or make Google unescape the string again?

EDIT: I solved it, after comparing the request from the browser and my program, I realized that my browser was sending some additional headers. The changed implementation looks like this

using (var client = new WebClient())
{
    client.Headers.Add("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8");
    client.Headers.Add("Accept-Encoding", "gzip,deflate,sdch");
    client.Headers.Add("Accept-Language", "de-DE,de;q=0.8,en-US;q=0.6,en;q=0.4");
    client.Encoding = System.Text.Encoding.UTF8;
    result = client.DownloadString(requestUri);
}

Thanks a lot to everyone that helped!

解决方案

It has to escape the url. However there is nothing stopping you from using HttpUtility.UrlDecode to unescape it. Also have a look here for a more indepth answer.

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