/// <summary>
/// 下载文件。
/// </summary>
/// <param name="address">网址。</param>
/// <param name="fileName">本地保存文件位置。</param>
/// <param name="refererUrl">来路（引用页面）。</param>
public void DownloadFile(Uri address, string fileName, Uri refererUrl)
{
lock (this) {
using (HttpWebClient webclient = CreateWebClient(refererUrl)) {
DownloadFileInternal(address, fileName, webclient, 0, null);
ResponseHeaders = webclient.ResponseHeaders;
}
}
}
/// <summary>
/// 上传数据（自定义上传方式）。
/// </summary>
/// <param name="address">网址。</param>
/// <param name="data">要上传的数据。</param>
/// <param name="refererUrl">来路（引用页面）。</param>
/// <returns>返回上传后获取到的数据。</returns>
public byte[] UploadData(Uri address, byte[] data, Uri refererUrl)
{
lock (this) {
using (HttpWebClient webclient = CreateWebClient(refererUrl)) {
byte[] result = UploadDataInternal(address, data, webclient, 0, null);
ResponseHeaders = webclient.ResponseHeaders;
return(result);
}
}
}
/// <summary>
/// 上传文件。
/// </summary>
/// <param name="address">网址。</param>
/// <param name="fileName">本地文件位置。</param>
/// <param name="refererUrl">来路（引用页面）。</param>
/// <returns>返回上传之后获取到的数据。</returns>
public byte[] UploadFile(Uri address, string fileName, Uri refererUrl)
{
lock (this) {
using (HttpWebClient webclient = CreateWebClient(refererUrl)) {
byte[] result = UploadFileInternal(address, fileName, webclient, 0, null);
ResponseHeaders = webclient.ResponseHeaders;
return(result);
}
}
}
/// <summary>
/// 上传数据（Post文本，普通表单）。
/// </summary>
/// <param name="address">网址。</param>
/// <param name="data">要上传的数据。</param>
/// <param name="refererUrl">来路（引用页面）。</param>
/// <returns>返回上传后获取到的内容。</returns>
public string UploadString(Uri address, string data, Uri refererUrl)
{
lock (this) {
using (HttpWebClient webclient = CreateWebClient(refererUrl)) {
string result = UploadStringInternal(address, data, webclient, 0, null);
ResponseHeaders = webclient.ResponseHeaders;
return(result);
}
}
}
/// <summary>
/// 创建HttpWebClient的实例。
/// </summary>
/// <param name="refererUrl">来路（引用页面）。</param>
/// <returns>返回HttpWebClient的实例。</returns>
protected HttpWebClient CreateWebClient(Uri refererUrl)
{
HttpWebClient result = new HttpWebClient();
//result.Headers["User-Agent"] = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 1.1.4322; CIBA; InfoPath.2; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)";
//result.Headers["User-Agent"] = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET4.0C; .NET4.0E)";
//result.Headers["Accept"] = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*";
//result.Headers["Accept-Language"] = "zh-cn";
result.BaseAddress = BaseAddress;
if (Headers != null)
{
foreach (string item in Headers.AllKeys)
{
result.Headers[item] = Headers[item];
}
}
if (refererUrl != null)
{
result.Headers["Referer"] = refererUrl.AbsoluteUri;
}
if (AutomaticDecompression != null)
{
result.AutomaticDecompression = AutomaticDecompression.Value;
}
if (AllowAutoRedirect != null)
{
result.AllowAutoRedirect = AllowAutoRedirect.Value;
}
if (Expect100Continue != null)
{
result.Expect100Continue = Expect100Continue.Value;
}
if (AutoAppendPostHeader != null)
{
result.AutoAppendPostHeader = AutoAppendPostHeader.Value;
}
if (Timeout > 0)
{
result.Timeout = Timeout;
}
result.Cookies = Cookies;
if (Proxy != null)
{
result.Proxy = Proxy;
}
if (Encoding != null)
{
result.Encoding = Encoding;
}
return(result);
}
private byte[] UploadDataInternal(Uri address, byte[] data, HttpWebClient webclient, int count, Exception e)
{
if (count > RetryCount)
{
if (e != null)
{
throw e;
}
return(new byte[0]);
}
try {
return(webclient.UploadData(address, data));
} catch (WebException ex) {
return(UploadDataInternal(address, data, webclient, count + 1, ex));
}
}
private byte[] UploadFileInternal(Uri address, string fileName, HttpWebClient webclient, int count, Exception e)
{
if (count > RetryCount)
{
if (e != null)
{
throw e;
}
return(new byte[0]);
}
try {
return(webclient.UploadFile(address, fileName));
} catch (WebException ex) {
return(UploadFileInternal(address, fileName, webclient, count + 1, ex));
}
}
private string UploadStringInternal(Uri address, string data, HttpWebClient webclient, int count, Exception e)
{
if (count > RetryCount)
{
if (e != null)
{
throw e;
}
return(string.Empty);
}
try {
return(webclient.UploadString(address, data));
} catch (WebException ex) {
return(UploadStringInternal(address, data, webclient, count + 1, ex));
}
}
private void DownloadFileInternal(Uri address, string fileName, HttpWebClient webclient, int count, Exception e)
{
if (count > RetryCount)
{
if (e != null)
{
throw e;
}
return;
}
try {
webclient.DownloadFile(address, fileName);
} catch (WebException ex) {
DownloadFileInternal(address, fileName, webclient, count + 1, ex);
}
}