我尝试使用Android Async Http库作为我的客户端向我的REST网络服务发送POST请求。
对于我的网络服务，我使用的是RESTlet框架。
这是我的webservice上的处理程序方法：
@Override
public void handle(Request request, Response response) {
String type = request.getMethod().getName();
if(type.equalsIgnoreCase("get"))
{
response.setStatus(new Status(Status.CLIENT_ERROR_BAD_REQUEST, "GET Requests are not accepted"));
}
else if(type.equalsIgnoreCase("put"))
{
response.setStatus(new Status(Status.CLIENT_ERROR_BAD_REQUEST, "PUT Requests are not accepted"));
}
else if(type.equalsIgnoreCase("post"))
{
Vcard vcard = new Vcard(context);
String vcf = "";
try {
vcf = vcard.echoVcard(request.getEntity().getStream());
} catch (IOException e) {
Log.d(TAG, "Exception echoVcard: " + e.getMessage());
e.printStackTrace();
}
response.setEntity(vcf, MediaType.TEXT_PLAIN);
}
else if(type.equalsIgnoreCase("delete"))
{
response.setStatus(new Status(Status.CLIENT_ERROR_BAD_REQUEST, "DELETE Requests are not accepted"));
}
}
这是我在Vcard类中的echoVcard方法：
public String echoVcard(final InputStream is)
{
String vcf = "";
try {
final InputStream inputStream = is; //request.getEntity().getStream();
// Read the stream into a byte array
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] data;
int reads = inputStream.read();
while(reads != -1)
{
baos.write(reads);
reads = inputStream.read();
}
data = baos.toByteArray();
String content = new String(data, "UTF-8");
int delimiterEndIndex = content.indexOf("\r\n");
if (delimiterEndIndex > -1)
{
String delimiter = content.substring(0, content.indexOf("\r\n"));
Pattern p = Pattern.compile("(?:Content-Type:)(.*)(?:\r\n\r\n)");
Matcher m = p.matcher(content);
String type="";
Pattern p2 = Pattern.compile("(?:filename=\")(.*)(?:\").*");
Matcher m2 = p2.matcher(content);
String filename = "";
if (m2.find() && m.find())
{
type = m.group(1).trim(); // Access a submatch group; String can't do this.
filename = m2.group(1).trim(); // Access a submatch group; String can't do this.
int indexO1 = content.indexOf("filename=\""+filename+"\"\r\n\r\n");
int indexO2 = content.indexOf("Content-Type: "+type+"\r\n\r\n");
if(indexO1!=-1 || indexO2 != -1)
{
int contentStart = 0;
int indexO = (indexO1 == -1 ? indexO2 : indexO1);
if(indexO1 > -1){
contentStart=indexO+("filename=\""+filename+"\"\r\n\r\n").length();
}else{
contentStart=indexO+("Content-Type: "+type+"\r\n\r\n").length();
}
byte[] delimiterBytes = ("\r\n" + delimiter).getBytes("UTF-8");
int endIndex = indexOf(data, delimiterBytes, contentStart);
int contentLength = endIndex - contentStart;
// Extract the file contents from the byte array
byte[] fileData = new byte[contentLength];
fileData = Arrays.copyOfRange(data, contentStart, endIndex);
vcf = new String(fileData, "UTF-8");
}else{
ResourceException e2 = new ResourceException(Status.CLIENT_ERROR_BAD_REQUEST);
throw e2;
}
}else{
ResourceException e2 = new ResourceException(Status.CLIENT_ERROR_BAD_REQUEST);
throw e2;
}
}else{
ResourceException e2 = new ResourceException(Status.CLIENT_ERROR_BAD_REQUEST);
throw e2;
}
} catch (Exception e) {
e.printStackTrace();
ResourceException e2 = new ResourceException(Status.SERVER_ERROR_INTERNAL);
throw e2;
}
return vcf;
}
这是我的Android Async Http客户端：
public void testPostRequest()
{
try {
SyncHttpClient client = new SyncHttpClient();
String vcardSample = "BEGIN:VCARD " +
"\\nVERSION:2.1" +
"\\nN:Diane;Woolnough;;;" +
"\\nFN:Woolnough Diane" +
"\\nTEL;CELL:52388" +
"\\nORG:Norfolk Phone Book" +
"\\nEND:VCARD";
HttpEntity entity = new StringEntity(vcardSample);
InputStream is = new ByteArrayInputStream(vcardSample.getBytes());
HttpEntity entity2 = new InputStreamEntity(is, -1);
client.post(context, "http://localhost:8080/echo/file", entity2, "application/json", new AsyncHttpResponseHandler() {
@Override
public void onSuccess(String response) {
Log.d(TAG, "POST - Success expected -> Got success");
Log.d(TAG, "Echo back: " + response);
}
@Override
public void onFailure(int code, Header[] headers, byte[] responseBody, Throwable error) {
super.onFailure(code, headers, responseBody, error);
Log.d(TAG, "POST - Success expected -> Got failure");
Log.d(TAG, "POST Error: " + error.getLocalizedMessage());
Header[] headerArray = getRequestHeaders();
Log.d(TAG, "POST Code: " + code + " Header: " + headerArray.toString());
}
});
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
fail(e.getMessage());
}
}
这是我的堆栈跟踪：
W/System.err(10314): Bad Request (400) - The request could not be understood by the server due to malformed syntax
W/System.err(10314): at com.maineavtech.android.contactswebservicecrud.data.Vcard.echoVcard(Vcard.java:139)
W/System.err(10314): at com.maineavtech.android.contactswebservicecrud.resources.EchoFileRestlet.handle(EchoFileRestlet.java:45)
W/System.err(10314): at org.restlet.routing.Filter.doHandle(Filter.java:159)
W/System.err(10314): at org.restlet.routing.Filter.handle(Filter.java:206)
W/System.err(10314): at org.restlet.routing.Router.doHandle(Router.java:431)
W/System.err(10314): at org.restlet.routing.Router.handle(Router.java:648)
W/System.err(10314): at org.restlet.routing.Filter.doHandle(Filter.java:159)
W/System.err(10314): at org.restlet.routing.Filter.handle(Filter.java:206)
W/System.err(10314): at org.restlet.routing.Filter.doHandle(Filter.java:159)
W/System.err(10314): at org.restlet.routing.Filter.handle(Filter.java:206)
W/System.err(10314): at org.restlet.routing.Router.doHandle(Router.java:431)
W/System.err(10314): at org.restlet.routing.Router.handle(Router.java:648)
W/System.err(10314): at org.restlet.routing.Filter.doHandle(Filter.java:159)
W/System.err(10314): at org.restlet.routing.Filter.handle(Filter.java:206)
W/System.err(10314): at org.restlet.routing.Router.doHandle(Router.java:431)
W/System.err(10314): at org.restlet.routing.Router.handle(Router.java:648)
W/System.err(10314): at org.restlet.routing.Filter.doHandle(Filter.java:159)
W/System.err(10314): at org.restlet.routing.Filter.handle(Filter.java:206)
W/System.err(10314): at org.restlet.routing.Router.doHandle(Router.java:431)
W/System.err(10314): at org.restlet.routing.Router.handle(Router.java:648)
W/System.err(10314): at org.restlet.routing.Filter.doHandle(Filter.java:159)
W/System.err(10314): at org.restlet.engine.application.StatusFilter.doHandle(StatusFilter.java:155)
W/System.err(10314): at org.restlet.routing.Filter.handle(Filter.java:206)
W/System.err(10314): at org.restlet.routing.Filter.doHandle(Filter.java:159)
W/System.err(10314): at org.restlet.routing.Filter.handle(Filter.java:206)
W/System.err(10314): at org.restlet.engine.CompositeHelper.handle(CompositeHelper.java:211)
W/System.err(10314): at org.restlet.Component.handle(Component.java:392)
W/System.err(10314): at org.restlet.Server.handle(Server.java:516)
W/System.err(10314): at org.restlet.engine.connector.ServerConnectionHelper.handle(ServerConnectionHelper.java:257)
W/System.err(10314): at org.restlet.engine.connector.ServerConnectionHelper.doHandleInbound(ServerConnectionHelper.java:186)
W/System.err(10314): at org.restlet.engine.connector.BaseHelper$2.run(BaseHelper.java:593)
W/System.err(10314): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
W/System.err(10314): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
W/System.err(10314): at java.lang.Thread.run(Thread.java:841)
W/System.err(10314): Exception or error caught in status service
W/System.err(10314): Internal Server Error (500) - The server encountered an unexpected condition which prevented it from fulfilling the request
W/System.err(10314): at com.maineavtech.android.contactswebservicecrud.data.Vcard.echoVcard(Vcard.java:145)
W/System.err(10314): at com.maineavtech.android.contactswebservicecrud.resources.EchoFileRestlet.handle(EchoFileRestlet.java:45)
W/System.err(10314): at org.restlet.routing.Filter.doHandle(Filter.java:159)
W/System.err(10314): at org.restlet.routing.Filter.handle(Filter.java:206)
W/System.err(10314): at org.restlet.routing.Router.doHandle(Router.java:431)
W/System.err(10314): at org.restlet.routing.Router.handle(Router.java:648)
W/System.err(10314): at org.restlet.routing.Filter.doHandle(Filter.java:159)
W/System.err(10314): at org.restlet.routing.Filter.handle(Filter.java:206)
W/System.err(10314): at org.restlet.routing.Filter.doHandle(Filter.java:159)
W/System.err(10314): at org.restlet.routing.Filter.handle(Filter.java:206)
W/System.err(10314): at org.restlet.routing.Router.doHandle(Router.java:431)
W/System.err(10314): at org.restlet.routing.Router.handle(Router.java:648)
W/System.err(10314): at org.restlet.routing.Filter.doHandle(Filter.java:159)
W/System.err(10314): at org.restlet.routing.Filter.handle(Filter.java:206)
W/System.err(10314): at org.restlet.routing.Router.doHandle(Router.java:431)
W/System.err(10314): at org.restlet.routing.Router.handle(Router.java:648)
W/System.err(10314): at org.restlet.routing.Filter.doHandle(Filter.java:159)
W/System.err(10314): at org.restlet.routing.Filter.handle(Filter.java:206)
W/System.err(10314): at org.restlet.routing.Router.doHandle(Router.java:431)
W/System.err(10314): at org.restlet.routing.Router.handle(Router.java:648)
W/System.err(10314): at org.restlet.routing.Filter.doHandle(Filter.java:159)
W/System.err(10314): at org.restlet.engine.application.StatusFilter.doHandle(StatusFilter.java:155)
W/System.err(10314): at org.restlet.routing.Filter.handle(Filter.java:206)
W/System.err(10314): at org.restlet.routing.Filter.doHandle(Filter.java:159)
W/System.err(10314): at org.restlet.routing.Filter.handle(Filter.java:206)
W/System.err(10314): at org.restlet.engine.CompositeHelper.handle(CompositeHelper.java:211)
W/System.err(10314): at org.restlet.Component.handle(Component.java:392)
W/System.err(10314): at org.restlet.Server.handle(Server.java:516)
W/System.err(10314): at org.restlet.engine.connector.ServerConnectionHelper.handle(ServerConnectionHelper.java:257)
W/System.err(10314): at org.restlet.engine.connector.ServerConnectionHelper.doHandleInbound(ServerConnectionHelper.java:186)
W/System.err(10314): at org.restlet.engine.connector.BaseHelper$2.run(BaseHelper.java:593)
W/System.err(10314): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
W/System.err(10314): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
W/System.err(10314): at java.lang.Thread.run(Thread.java:841)
W/System.err(10314): 2014-04-10 03:30:13 127.0.0.1 - - 8080 POST /echo/file - 500 486 - 71 http://localhost:8080 android-async-http/1.4.4 (http://loopj.com/android-async-http) -
D/EchoFileRestletTest(10314): POST - Success expected -> Got failure
D/EchoFileRestletTest(10314): POST Error: Internal Server Error
W/System.err(10314): java.io.IOException: NPE in HttpClient: null
W/System.err(10314): at com.loopj.android.http.AsyncHttpRequest.makeRequestWithRetries(AsyncHttpRequest.java:103)
W/System.err(10314): at com.loopj.android.http.AsyncHttpRequest.run(AsyncHttpRequest.java:54)
W/System.err(10314): at com.loopj.android.http.SyncHttpClient.sendRequest(SyncHttpClient.java:72)
W/System.err(10314): at com.loopj.android.http.AsyncHttpClient.post(AsyncHttpClient.java:688)
W/System.err(10314): at com.pedro.notesquirrel.test.resources.EchoFileRestletTest.testPostRequest(EchoFileRestletTest.java:131)
W/System.err(10314): at java.lang.reflect.Method.invokeNative(Native Method)
W/System.err(10314): at java.lang.reflect.Method.invoke(Method.java:515)
W/System.err(10314): at junit.framework.TestCase.runTest(TestCase.java:168)
W/System.err(10314): at junit.framework.TestCase.runBare(TestCase.java:134)
W/System.err(10314): at junit.framework.TestResult$1.protect(TestResult.java:115)
W/System.err(10314): at junit.framework.TestResult.runProtected(TestResult.java:133)
W/System.err(10314): at junit.framework.TestResult.run(TestResult.java:118)
W/System.err(10314): at junit.framework.TestCase.run(TestCase.java:124)
W/System.err(10314): at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:191)
W/System.err(10314): at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:176)
W/System.err(10314): at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:554)
W/System.err(10314): at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1701)
D/EchoFileRestletTest(10314): POST - Success expected -> Got failure
D/EchoFileRestletTest(10314): POST Error: NPE in HttpClient: null
任何人都可以请我指出我收到的400 Bad Request的错误在哪里？
答案 0 :(得分：0)
从你的评论中我把它读作最外面的，如果是这样的话，在这种情况下，instr无法在数据中找到\n\r字符对，这可能是因为在VCARD创建中你只使用了一个新的行字符（ \n）。我将假设\\正确地转义\，然后生成的\n实际编码。