如何解决C#多个http请求同一个PHP会话
| 我正在尝试将图片加载到将发送POST请求的同一PHP会话中。 但是由于我使用的是button1_Click,所以这是不可能的。 结果是在发送数据之前先加载图片。 如果您有任何疑问,请询问。 我知道我加载图片时出错,但是我不知道确切的位置。 使用Visual C#2010 Express WinFormsprivate void Form1_Load(object sender,EventArgs e)
{
pictureBox1.ImageLocation = \"http://localhost/proj/guess-my-fav/1.jpg\";
}
private void button1_Click(object sender,EventArgs e)
{
Uri uri = new Uri(\"http://localhost/proj/guess-my-fav/level14.php\");
var answer = textBox1.Text;
string data = \"guess=\" + answer + \"&level=14&time=opt\";
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(uri);
request.Method = WebRequestMethods.Http.Post;
request.CookieContainer = new CookieContainer();
request.KeepAlive = true;
request.ContentLength = data.Length;
request.ContentType = \"application/x-www-form-urlencoded\";
StreamWriter writer = new StreamWriter(request.GetRequestStream());
writer.Write(data);
writer.Close();
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream());
string tmp = reader.ReadToEnd();
response.Close();
richTextBox1.AppendText(tmp); // log - delete this line
}
如何将图像渲染置于第二个请求下?
解决方法
如果您修改代码以使其匹配
private CookieContainer cookieContainer;
private void Form1_Load(object sender,EventArgs e)
{
var wr = (HttpWebRequest)WebRequest.Create(\"http://localhost/proj/guess-my-fav/1.jpg\");
cookieContainer = new CookieContainer();
wr.CookieContainer = this.cookieContainer;
var resp = (HttpWebResponse)wr.GetResponse();
wr.CookieContainer = cookieContainer;
using (var s = resp.GetResponseStream())
{
pictureBox1.Image = new Bitmap(s);
}
}
private void button1_Click(object sender,EventArgs e)
{
Uri uri = new Uri(\"http://localhost/proj/guess-my-fav/level14.php\");
var answer = textBox1.Text;
string data = \"guess=\" + answer + \"&level=14&time=opt\";
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(uri);
request.Method = WebRequestMethods.Http.Post;
request.CookieContainer = cookieContainer;
request.KeepAlive = true;
request.ContentLength = data.Length;
request.ContentType = \"application/x-www-form-urlencoded\";
StreamWriter writer = new StreamWriter(request.GetRequestStream());
writer.Write(data);
writer.Close();
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream());
string tmp = reader.ReadToEnd();
response.Close();
richTextBox1.AppendText(tmp); // log - delete this line
}
这应该使用相同的会话向服务器发出两个请求。
希望这可以帮助。
,pictureBox1.ImageLocation = \"http://localhost/proj/guess-my-fav/1.jpg\";
这将导致客户端的浏览器请求1.jpg
Uri uri = new Uri(\"http://localhost/proj/guess-my-fav/level14.php\");
...
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
这将导致运行ASP.NET网站的Web服务器发出ѭ5请求。
您不会使用相同的会话来获得这两个请求,因为它们将来自两台不同的机器!
您可能希望研究将HttpWebRequest
代码移出后端,然后将其作为AJAX请求在客户端重新实现。然后,两个请求都将来自客户端的浏览器。
,我在这里假设您要在单击按钮时重新加载图像。
首先,“ 7”属性可能不会尊重您的会话Cookie,因此您可能必须手动下载映像。您已经使用了CookieContainer
,所以这是一个不错的开始。
我们在这里要做的是使用一个新的ѭ6下载图像并将其附加到ѭ8上,因为该图像应在您首次通话后保存会话ID。
然后,我们可以使用HttpWebResponse
创建一个Image
对象并将其分配给pictureBox1.Image
属性。
所有这些可能看起来像这样:
private void button1_Click(object sender,EventArgs e)
{
Uri uri = new Uri(\"http://localhost/proj/guess-my-fav/level14.php\");
var answer = textBox1.Text;
string data = \"guess=\" + answer + \"&level=14&time=opt\";
CookieContainer cookies = new CookieContainer(); /* we want to have this for other call also
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(uri);
request.Method = WebRequestMethods.Http.Post;
request.CookieContainer = cookies;
request.KeepAlive = true;
request.ContentLength = data.Length;
request.ContentType = \"application/x-www-form-urlencoded\";
StreamWriter writer = new StreamWriter(request.GetRequestStream());
writer.Write(data);
writer.Close();
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream());
string tmp = reader.ReadToEnd();
response.Close();
richTextBox1.AppendText(tmp); // log - delete this line
HttpWebRequest request2 = (HttpWebRequest)HttpWebRequest.Create(\"http://localhost/proj/guess-my-fav/1.jpg\");
request2.CookieContainer = cookies;
HttpWebResponse response2 = (HttpWebResponse)request.GetResponse();
pictureBox1.Image = Image.LoadFromStream(response2.GetResponseStream());
}
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