public static HttpHelperHandle StartDownLoadWithMD5(string url, string path, string md5)
{
HttpHelperHandle handle = new HttpHelperHandle();
handle.url = url;
handle.isFinish = false;
CoroutineUtil.RunCoroutine(HttpDownloadFileWithMD5(url, path, handle, md5));
return(handle);
}
public static HttpHelperHandle StartGetText(string url)
{
HttpHelperHandle handle = new HttpHelperHandle();
handle.url = url;
handle.isFinish = false;
CoroutineUtil.RunCoroutine(GetText(url, handle));
return(handle);
}
public static IEnumerator HttpDownloadFileWithMD5(string url, string path, HttpHelperHandle handle, string md5) //从Http下载文件
{
HttpWebRequest request = null;
HttpWebResponse response = null;
Stream responseStream = null;
Stream stream = null;
handle.HasError = false;
handle.url = url;
int size = 0;
//如果文件存在，检查md5
if (System.IO.File.Exists(path))
{
string _md5 = HttpHelper.GetFileFormatMD5(path);
if (_md5 == md5)
{
handle.isFinish = true;
goto finish;
}
}
bool reconnend = false;
//是否断点续传
string temp = path + ".dltmp";
long fileLength = 0;
if (System.IO.File.Exists(path) && System.IO.File.Exists(temp))
{
string _md5 = System.IO.File.ReadAllText(temp);
fileLength = new System.IO.FileInfo(path).Length;
if (_md5 == md5)
{
reconnend = true;
}
}
//非写入新md5
if (!reconnend)
{
System.IO.File.WriteAllText(temp, md5);
}
//byte[] bArr = new byte[1024 * 128];
byte[] bArr = new byte[500];
try
{
#if UNITY_ANDROID
Debug.LogError("WebRequest" + url);
#endif
request = WebRequest.Create(url) as HttpWebRequest;
//发送请求并获取相应回应数据
if (reconnend)
{
request.AddRange(fileLength);
}
response = request.GetResponse() as HttpWebResponse;
handle.statusCode = response.StatusCode;
if (response.StatusCode == HttpStatusCode.OK || response.StatusCode == HttpStatusCode.PartialContent)
{
handle.totalSize = (int)response.ContentLength;
responseStream = response.GetResponseStream();
if (reconnend)
{
//创建本地文件写入流
stream = new FileStream(path, FileMode.Append);
//responseStream.Seek(fileLength,SeekOrigin.Begin);
}
else
{
//创建本地文件写入流
stream = new FileStream(path, FileMode.Create);
}
size = responseStream.Read(bArr, 0, (int)bArr.Length);
}
else
{
size = 0;
handle.isFinish = true;
handle.error = null;
}
}
catch (System.Exception e)
{
handle.isFinish = true;
handle.error = e;
handle.HasError = true;
}
while (size > 0)
{
stream.Write(bArr, 0, size);
handle.curSize += size;
try
{
size = responseStream.Read(bArr, 0, (int)bArr.Length);
}
catch (System.Exception e)
{
handle.isFinish = true;
handle.error = e;
handle.HasError = true;
}
yield return(null);
}
if (null != stream)
{
stream.Close();
}
if (null != responseStream)
{
responseStream.Close();
}
if (null != request)
{
request.Abort();
}
finish:
handle.isFinish = true;
}
public static IEnumerator GetText(string url, HttpHelperHandle handle) //从Http下载文件
{
HttpWebRequest request = null;
HttpWebResponse response = null;
Stream responseStream = null;
handle.HasError = false;
handle.url = url;
handle.txt = "";
int size = 0;
MemoryStream memStream = new MemoryStream(1024 * 128);
// 设置参数string
byte[] bArr = new byte[1024 * 128];
try
{
#if UNITY_ANDROID
Debug.LogError("WebRequest" + url);
#endif
request = WebRequest.Create(url) as HttpWebRequest;
//发送请求并获取相应回应数据
response = request.GetResponse() as HttpWebResponse;
handle.statusCode = response.StatusCode;
if (response.StatusCode == HttpStatusCode.OK)
{
handle.totalSize = (int)response.ContentLength;
//直到request.GetResponse()程序才开始向目标网页发送Post请求
responseStream = response.GetResponseStream();
//stream.Dispose();//防止错误IOException: Sharing violation on path 的解决方案
size = responseStream.Read(bArr, 0, (int)bArr.Length);
}
else
{
size = 0;
handle.isFinish = true;
handle.error = null;
handle.HasError = true;
handle.statusCode = response.StatusCode;
}
}
catch (System.Exception e)
{
handle.isFinish = true;
handle.error = e;
handle.HasError = true;
handle.statusCode = response.StatusCode;
}
while (size > 0)
{
memStream.Write(bArr, 0, size);
//stream.Write(bArr, 0, size);
handle.curSize += size;
size = responseStream.Read(bArr, 0, (int)bArr.Length);
yield return(null);
}
if (null != responseStream)
{
responseStream.Close();
}
if (null != request)
{
request.Abort();
}
handle.txt = System.Text.Encoding.UTF8.GetString(memStream.ToArray());
handle.isFinish = true;
}