我想構建簡單的網絡服務器,可以傳輸文件。
我知道,有很多的例子,但大多過於複雜,瞭解的人誰從來沒有與HTTP工作
所以我有...使用HTTP響應傳輸文件的正確方法是什麼?
public Hashtable MimeTypes = new Hashtable();
public HttpServer(int port)
{
this.port = port;
MimeTypes.Add("html", "text/html");
MimeTypes.Add("htm", "text/html");
MimeTypes.Add("css", "text/css");
MimeTypes.Add("js", "application/x-javascript");
MimeTypes.Add("png", "image/png");
MimeTypes.Add("gif", "image/gif");
MimeTypes.Add("jpg", "image/jpeg");
MimeTypes.Add("jpeg", "image/jpeg");
}
public void writeSuccess(string mime_type, string file_name, int file_size)
{
outputStream.Write("HTTP/1.0 200 OK\n");
outputStream.Write("Content-Type: " + mime_type + "\n");
if (file_name != null)//if file name isn't null, this mean we need to add additional headers
{
outputStream.Write("Content-Disposition: attachment; filename=" + file_name);
outputStream.Write("Content-Length: " + file_size);
}
outputStream.Write("Connection: close\n");
outputStream.Write("\n");
}
public override void handleGETRequest(HttpProcessor p)
{
Console.WriteLine("request: {0}", p.http_url);
byte[] file_content = null;
try { file_content = File.ReadAllBytes(work_folder + p.http_url); } //tring to read requested file
catch (Exception exc) { p.writeFailure(); return; } //return failure if no such file
string[] splitted_html_url = p.http_url.Split(new char[] { '.' }, StringSplitOptions.RemoveEmptyEntries); //splitting url for future format check
string mime_type = "application/octet-stream"; //the most generic type
if (MimeTypes.Contains(splitted_html_url[splitted_html_url.Length - 1]))
mime_type = (string)MimeTypes[splitted_html_url[splitted_html_url.Length - 1]]; //set mimy type that math to requested file format
if (mime_type.Contains("image") || mime_type == "application/octet-stream") //hacky thing for tests...
p.writeSuccess(mime_type, p.http_url.Remove(0, 1), file_content.Length); //if mime type is image or unknown, than pass file name and length to responce builder
else
p.writeSuccess(mime_type, null, 0); //er else just add general headers
p.outputStream.Write(Encoding.ASCII.GetString(file_content)); //write file content after headers
}
它適用於HTML轉讓,但我不能讓它傳輸圖像:(
,如果我做的HTML頁面本文標籤:
<img src = "logo225x90.gif" width = "100%" height = "100%" />
,並把這個文件到正確的目錄,但它仍然顯示在瀏覽器丟失的文件
調試和檢查,如果work_folder + p.http_url是正確的,也許有一個\或路徑/失蹤? – user1519979 2012-08-02 14:58:09
沒有缺失。文件是成功的 – Kosmos 2012-08-02 14:58:54