HttpWebRequest发布用于AWS文件上传请求的参数,导致400错误 [英] HttpWebRequest post paramaters for AWS file upload request, leading to 400 error
问题描述
我正在尝试将文件从Unity游戏上传到我的AWS账户.可以在此处找到执行此操作的表格.早些时候,我使用FILEUPLOAD_BASE_URL
作为" https://file.ac/xySSFOicMMk/"不需要密钥即可上传文件(链接此处).但是,AWS文件上传需要格式为"/$ {filename}"的键参数.我将值指定为sb.Append("key: AffectivaLogs/${filename}");
,如下所示,但是请求抛出400错误.这是将密钥指定为发布请求参数的正确方法吗?
I am trying to upload files from my Unity game to my AWS account. The form for doing this can be found here. Earlier I was using FILEUPLOAD_BASE_URL
to be "https://file.ac/xySSFOicMMk/" which doesn't require a key to upload the file (link here). However, the AWS file upload require a key param in the form whose value can be "/${filename}". I specified the value as sb.Append("key: AffectivaLogs/${filename}");
as shows below, but the request is throwing a 400 error. Is this the correct way to specify the key as a post request parameter?
private string FILEUPLOAD_BASE_URL = "http://gameexperiencesurvey.s3.amazonaws.com/";
public void uploadToDrive()
{
string[] files = Directory.GetFiles(".", "*.txt");
for (int i = 0; i < files.Length; i++)
{
string boundary = "----------" + DateTime.Now.Ticks.ToString("x");
ServicePointManager.ServerCertificateValidationCallback = MyRemoteCertificateValidationCallback;
HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create(FILEUPLOAD_BASE_URL);
webrequest.ContentType = "multipart/form-data; boundary=" + boundary;
webrequest.Method = "POST";
// Build up the post message header
StringBuilder sb = new StringBuilder();
sb.Append("--");
sb.Append(boundary);
sb.Append("\r\n");
sb.Append("key: AffectivaLogs/${filename}"); // is this how it should be?
sb.Append("\r\n");
sb.Append("Content-Disposition: form-data; name=\"");
sb.Append("file"); // file form name
sb.Append("\"; filename=\"");
sb.Append(Path.GetFileName(files[i]));
sb.Append("\"");
sb.Append("\r\n");
sb.Append("Content-Type: ");
sb.Append("text/plain");
sb.Append("\r\n");
sb.Append("\r\n");
string postHeader = sb.ToString();
byte[] postHeaderBytes = Encoding.UTF8.GetBytes(postHeader);
// Build the trailing boundary string as a byte array
// ensuring the boundary appears on a line by itself
byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
FileStream fileStream = new FileStream(files[i], FileMode.Open, FileAccess.Read);
long length = postHeaderBytes.Length + fileStream.Length + boundaryBytes.Length;
webrequest.ContentLength = length;
Stream requestStream = webrequest.GetRequestStream();
// Write out our post header
requestStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);
// Write out the file contents
byte[] buffer = new Byte[checked((uint)Math.Min(4096, (int)fileStream.Length))];
int bytesRead = 0;
while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
requestStream.Write(buffer, 0, bytesRead);
// Write out the trailing boundary
requestStream.Write(boundaryBytes, 0, boundaryBytes.Length);
try
{
WebResponse response = webrequest.GetResponse();
Stream s = response.GetResponseStream();
StreamReader sr = new StreamReader(s);
}
catch (Exception e)
{
Debug.Log("Error occured .... " + e.Message);
}
}
}
public bool MyRemoteCertificateValidationCallback(System.Object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
{
bool isOk = true;
// If there are errors in the certificate chain, look at each error to determine the cause.
if (sslPolicyErrors != SslPolicyErrors.None)
{
for (int i = 0; i < chain.ChainStatus.Length; i++)
{
if (chain.ChainStatus[i].Status != X509ChainStatusFlags.RevocationStatusUnknown)
{
chain.ChainPolicy.RevocationFlag = X509RevocationFlag.EntireChain;
chain.ChainPolicy.RevocationMode = X509RevocationMode.Online;
chain.ChainPolicy.UrlRetrievalTimeout = new TimeSpan(0, 1, 0);
chain.ChainPolicy.VerificationFlags = X509VerificationFlags.AllFlags;
bool chainIsValid = chain.Build((X509Certificate2)certificate);
if (!chainIsValid)
{
isOk = false;
}
}
}
}
return isOk;
}
错误如下:
推荐答案
Yesterday I was trying to use WWWForm and WWW to upload file and I had a problem where adding the binary data to WWWform was not working. Seems like in order for WWWForm to work, you need to have both the binary and non-binary data in your form. Thus, the following solution worked.
public void uploadToAWS()
{
fileNameList = "";
string[] files = Directory.GetFiles(".", "*.txt");
for (int i = 0; i < files.Length; i++)
{
WWWForm AWSform = new WWWForm();
AWSform.AddField("key", "AffectivaLogs/${filename}");
AWSform.AddBinaryData("file", File.ReadAllBytes(files[i]), files[i], "text/plain");
StartCoroutine(Post(FILEUPLOAD_BASE_URL, AWSform));
fileNameList += files[i].Replace(@".\", "") + " || ";
}
}
IEnumerator Post(string url, WWWForm form)
{
WWW www = new WWW(url, form);
float elapsedTime = 0.0f;
while (!www.isDone)
{
elapsedTime += Time.deltaTime;
//Matrix4x4 wait time is 20s
if (elapsedTime >= 20f)
{
break;
}
yield return null;
}
if (!www.isDone || !string.IsNullOrEmpty(www.error))
{
Debug.LogError("Connection error while sending analytics... Error:" + www.error);
// Error handling here.
yield break;
}
if (www.isDone)
{
Debug.Log("Data Sent successfully.");
yield break;
}
}
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