Java Android对web api的多部分请求未获取与请求关联的文本
你好，我在安卓工作。我想将多部分数据发送到asp.net web api。我有一个json数据和多个图像Java Android对web api的多部分请求未获取与请求关联的文本,java,android,api,http,Java,Android,Api,Http,你好，我在安卓工作。我想将多部分数据发送到asp.net web api。我有一个json数据和多个图像 public int uploadFile(Context context,ArrayList<String> sourceFileUri,String json,String url1) { // Toast.makeText(this,"uploading...", Toast.LENGTH_SHORT).show(); Stri
public int uploadFile(Context context,ArrayList<String> sourceFileUri,String json,String url1) {
// Toast.makeText(this,"uploading...", Toast.LENGTH_SHORT).show();
StrictMode.ThreadPolicy policy = new
StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
Log.i("uploadimage", "" + sourceFileUri.get(0));
HttpURLConnection conn = null;
DataOutputStream dos = null;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024 * 1024;
File sourceFile = new File(android.os.Environment.getExternalStorageDirectory() + "/TrackonPro", sourceFileUri.get(0));
if (!sourceFile.isFile()) {
Log.i("uploadFile", "Source File not exist :" + sourceFileUri);
return 0;
}
else
{
// Toast.makeText(this,"found Path : "+imagePath , Toast.LENGTH_LONG).show();
try {
// Toast.makeText(this,"try....", Toast.LENGTH_LONG).show();
// open a URL connection to the Servlet
FileInputStream fileInputStream = new FileInputStream(sourceFile);
URL url = new URL(url1);
// Open a HTTP connection to the URL
conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true); // Allow Inputs
conn.setDoOutput(true); // Allow Outputs
conn.setUseCaches(false); // Don't use a Cached Copy
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("ENCTYPE", "multipart/form-data");
conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
// Toast.makeText(this,"url : "+ url, Toast.LENGTH_LONG).show();
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
// JSON STRING
dos.writeBytes("Content-Disposition: form-data; name=\"sanu\"");
dos.writeBytes(lineEnd);
dos.writeBytes(json);
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + lineEnd);
Log.i("immmm11",""+dos);
// IMAGE
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename="+ sourceFileUri + "" + lineEnd);
dos.writeBytes(lineEnd);
Log.i("immmm22", "" + dos);
// create a buffer of maximum size
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
// read file and write it into form...
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0) {
// Toast.makeText(this,": while", Toast.LENGTH_LONG).show();
dos.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
// send multipart form data necesssary after file data...
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
Log.i("immmm33", "" + dos);
// Responses from the server (code and message)
serverResponseCode = conn.getResponseCode();
String serverResponseMessage = conn.getResponseMessage();
Log.i("uploadFile", "HTTP Response is : "+ serverResponseMessage + ": " + serverResponseCode);
// Toast.makeText(getApplicationContext(), "HTTP Response is : "+ serverResponseMessage + ": " + serverResponseCode,
// Toast.LENGTH_SHORT).show();
if(serverResponseCode == 200){
// Toast.makeText(context, "File Upload Complete.",
// Toast.LENGTH_SHORT).show();
}
//close the streams //
fileInputStream.close();
dos.flush();
dos.close();
} catch (MalformedURLException ex) {
ex.printStackTrace();
// Toast.makeText(context, "MalformedURLException",
// Toast.LENGTH_SHORT).show();
Log.e("Upload file to server", "error: " + ex.getMessage(), ex);
} catch (Exception e) {
e.printStackTrace();
// Toast.makeText(context, " Exception : try again ! ",
// Toast.LENGTH_SHORT).show();
// Log.i("Upload file to server Exception", "Exception : " + e.getMessage());
}
return serverResponseCode;
} // End else block
}
public int uploadFile（上下文上下文、ArrayList sourceFileUri、字符串json、字符串url1）{
//Toast.makeText（这是“上载…”，Toast.LENGTH_SHORT.show（）；
StrictMode.ThreadPolicy策略=新建
StrictMode.ThreadPolicy.Builder（）.permitAll（）.build（）；
StrictMode.setThreadPolicy（策略）；
Log.i（“uploadimage”，“sourceFileUri.get（0））；
HttpURLConnection conn=null；
DataOutputStream dos=null；
字符串lineEnd=“\r\n”；
字符串双连字符=“--”；
字符串边界=“*******”；
int字节读取，字节可用，缓冲区大小；
字节[]缓冲区；
int maxBufferSize=1*1024*1024；
File sourceFile=新文件（android.os.Environment.getExternalStorageDirectory（）+“/TrackonPro”，sourceFileUri.get（0））；
如果（！sourceFile.isFile（））{
Log.i（“uploadFile”，“源文件不存在：“+sourceFileUri”）；
返回0；
}
其他的
{
//Toast.makeText（这是“找到的路径：”+imagePath，Toast.LENGTH_LONG.show（）；
试一试{
//Toast.makeText（这是“try…”，Toast.LENGTH_LONG.show（）；
//打开到Servlet的URL连接
FileInputStream FileInputStream=新的FileInputStream（sourceFile）；
URL=新URL（url1）；
//打开到URL的HTTP连接
conn=（HttpURLConnection）url.openConnection（）；
conn.setDoInput（true）；//允许输入
conn.setDoOutput（true）；//允许输出
conn.setUseCaches（false）；//不要使用缓存副本
conn.setRequestMethod（“POST”）；
conn.setRequestProperty（“连接”、“保持活动”）；
conn.setRequestProperty（“ENCTYPE”、“多部分/表单数据”）；
conn.setRequestProperty（“内容类型”、“多部分/表单数据；边界=“+boundary”）；
//Toast.makeText（这个，“url:+url，Toast.LENGTH_LONG）.show（）；
dos=新的DataOutputStream（conn.getOutputStream（））；
写字节（两个连字符+边界+行结束）；
//JSON字符串
writeBytes（“内容处置：表单数据；名称=\“sanu\”）；
dos.writeBytes（lineEnd）；
dos.writeBytes（json）；
dos.writeBytes（lineEnd）；
写字节（两个连字符+边界+行结束）；
Log.i（“immm11”和“+dos”）；
//形象
写字节（两个连字符+边界+行结束）；
dos.writeBytes（“内容处置：表单数据；名称=\”上传的文件\“文件名=”+sourceFileUri+“”+lineEnd）；
dos.writeBytes（lineEnd）；
Log.i（“immm22”和“+dos”）；
//创建最大大小的缓冲区
bytesAvailable=fileInputStream.available（）；
bufferSize=Math.min（字节可用，maxBufferSize）；
buffer=新字节[bufferSize]；
//读取文件并将其写入表单。。。
bytesRead=fileInputStream.read（缓冲区，0，缓冲区大小）；
而（字节读取>0）{
//Toast.makeText（这个“：while”，Toast.LENGTH_LONG.show（）；
写入（缓冲区，0，缓冲区大小）；
bytesAvailable=fileInputStream.available（）；
bufferSize=Math.min（字节可用，maxBufferSize）；
bytesRead=fileInputStream.read（缓冲区，0，缓冲区大小）；
}
//发送文件数据后所需的多部分表单数据。。。
dos.writeBytes（lineEnd）；
写字节（两个连字符+边界+两个连字符+行结束）；
Log.i（“immm33”和“+dos”）；
//来自服务器的响应（代码和消息）
serverResponseCode=conn.getResponseCode（）；
字符串serverResponseMessage=conn.getResponseMessage（）；
Log.i（“uploadFile”，“HTTP响应为：“+serverResponseMessage+”：“+serverResponseCode”）；
//Toast.makeText（getApplicationContext（），“HTTP响应为：“+serverResponseMessage+”：“+serverResponseCode，
//吐司。长度（短）。show（）；
如果（服务器响应代码==200）{
//Toast.makeText（上下文，“文件上载完成”，
//吐司。长度（短）。show（）；
}
//关闭溪流//
fileInputStream.close（）；
dos.flush（）；
dos.close（）；
}捕获（格式错误）{
例如printStackTrace（）；
//Toast.makeText（上下文，“MalformedURLException”，
//吐司。长度（短）。show（）；
Log.e（“将文件上载到服务器”，“错误：+ex.getMessage（），ex”）；
}捕获（例外e）{
e、 printStackTrace（）；
//Toast.makeText（上下文，“异常：重试！”，
//吐司。长度（短）。show（）；
//i（“上传文件到服务器异常”，“异常：+e.getMessage（））；
}
返回服务器响应代码；
}//结束else块
}
System.IO.IOException: Error writing MIME multipart body part to output stream. ---> System.InvalidOperationException: The stream provider of type 'MultipartFormDataStreamProvider' threw an exception. ---> System.InvalidOperationException: Did not find required 'Content-Disposition' header field in MIME multipart body part.
at System.Net.Http.MultipartFormDataStreamProviderHelper.IsFileContent(HttpContent parent, HttpContentHeaders headers)
at System.Net.Http.MultipartFormDataStreamProvider.GetStream(HttpContent parent, HttpContentHeaders headers)
at System.Net.Http.MimeBodyPart.GetOutputStream()
--- End of inner exception stack trace ---
at System.Net.Http.MimeBodyPart.GetOutputStream()
at System.Net.Http.MimeBodyPart.<WriteSegment>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Net.Http.HttpContentMultipartExtensions.<MultipartReadAsync>d__8.MoveNext()
--- End of inner exception stack trace ---
at System.Net.Http.HttpContentMultipartExtensions.<MultipartReadAsync>d__8.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Net.Http.HttpContentMultipartExtensions.<ReadAsMultipartAsync>d__0`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at WebApplication.Areas.Json.Controllers.TravelClaimsController.<PostFormData>d__2.MoveNext()
System.IO.IOException:写入MIME多部分正文时出错
public class HttpClient {
public void connectForMultipart() throws Exception {
con = (HttpURLConnection) ( new URL(url)).openConnection();
con.setRequestMethod("POST");
con.setDoInput(true);
con.setDoOutput(true);
con.setRequestProperty("Connection", "Keep-Alive");
con.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);
con.connect();
os = con.getOutputStream();
}
public void addFormPart(String paramName, String value) throws Exception {
writeParamData(paramName, value);
}
private void writeParamData(String paramName, String value) throws Exception {
os.write( (delimiter + boundary + "\r\n").getBytes());
os.write( "Content-Type: text/plain\r\n".getBytes());
os.write( ("Content-Disposition: form-data; name=\"" + paramName + "\"\r\n").getBytes());;
os.write( ("\r\n" + value + "\r\n").getBytes());
}
private String delimiter = "--";
private String boundary = "SwA"+Long.toString(System.currentTimeMillis())+"SwA";
The binary data (the image or something like that)
public void addFilePart(String paramName, String fileName, byte[] data) throws Exception {
os.write( (delimiter + boundary + "\r\n").getBytes());
os.write( ("Content-Disposition: form-data; name=\"" + paramName + "\"; filename=\"" + fileName + "\"\r\n" ).getBytes());
os.write( ("Content-Type: application/octet-stream\r\n" ).getBytes());
os.write( ("Content-Transfer-Encoding: binary\r\n" ).getBytes());
os.write("\r\n".getBytes());
os.write(data);
os.write("\r\n".getBytes());
}
HttpClient client = new HttpClient(url);
client.connectForMultipart();
client.addFormPart("param1", param1);
client.addFormPart("param2", param2);
client.addFilePart("file", "logo.png", baos.toByteArray());
client.finishMultipart();
public void finishMultipart() throws Exception {
os.write( (delimiter + boundary + delimiter + "\r\n").getBytes());
}