C# HttpHandler WebRequest内容类型与浏览器不一样
我创建了一个使用WebRequest的方法 url是:C# HttpHandler WebRequest内容类型与浏览器不一样,c#,asp.net,.net,httpwebrequest,webrequest,C#,Asp.net,.net,Httpwebrequest,Webrequest,我创建了一个使用WebRequest的方法 url是:http://demo.boundlessgeo.com/geoserver/wms?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&FORMAT=image%2Fpng&TRANSPARENT=true&LAYERS=ne%3Ane&WIDTH=256&HEIGHT=256&CRS=EPSG%3A3857&STYLES=&BBOX=-80150033.37115698%2C0%2C-60112525.028
http://demo.boundlessgeo.com/geoserver/wms?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&FORMAT=image%2Fpng&TRANSPARENT=true&LAYERS=ne%3Ane&WIDTH=256&HEIGHT=256&CRS=EPSG%3A3857&STYLES=&BBOX=-80150033.37115698%2C0%2C-60112525.02836773%2C20037508.342789244
此url返回png图像。当我在浏览器上访问时,它会出现
我正在使用c#WebClient对象发送该url请求并返回一个
HttpWebRequest webRequest;
webRequest = (HttpWebRequest)WebRequest.Create(requestUrl);
webRequest.Method = "GET";
HttpWebResponse response = (System.Net.HttpWebResponse)webRequest.GetResponse();
if (response.StatusCode.ToString().ToLower() == "ok")
{
context.Response.ContentType = response.ContentType;
StreamReader reader = new System.IO.StreamReader(response.GetResponseStream());
context.Response.Write(reader.ReadToEnd());
}
这将返回一个编码文本,如下所示:
�PNG
IHDR\r�f��IDATx^�}�^IU盦�ǖ��VP�nő��%�\i��4N���yN۹N��N3s�V�{���d�\�x�6�H����B h�@�4 ��A9�����N=�T�]{?�I���Q��w��Z�j�U�V�����+���۱��-Vavvw2_T�/V�x�_�X1�}Պ�N+\�Gyv�����Z�����,�^�b���)���T~UkU�,�|��X�\�6�w��|��OoS�k����X�znm'��|��������X���y6�$]u���uQ]��̈�l�xEQ��
您认为有什么问题?
Response.BinaryWrite()
?也不要忘记处理您的请求/响应/readerI。我将使用此代码作为代理。太多的请求将到达这个代理。你觉得表演怎么样?我们在这里进行字节数组转换。我改变了我的解决方案,直接使用outputstream,不再需要ToArray调用。谢谢你的解决方案,为什么使用字节大小为4096?
context.Response.ContentType = response.ContentType;
using (WebResponse response = webRequest.GetResponse())
{
using (Stream responseStream = response.GetResponseStream())
{
using (Stream outputStream = context.Response.OutputStream)
{
int cnt = 0;
byte[] buffer = new byte[4096];
do
{
cnt = responseStream.Read(buffer, 0, buffer.Length);
outputStream.Write(buffer, 0, cnt);
} while(cnt != 0);
}
}
}