HttpConnection (ocap 1.3.1 API)

All Superinterfaces:

Connection, ContentConnection, InputConnection, OutputConnection, StreamConnection

All Known Subinterfaces:

HttpsConnection
```
public interface HttpConnection
extends ContentConnection
```
This interface defines the necessary methods and constants for an HTTP connection.
HTTP is a request-response protocol in which the parameters of request must be set before the request is sent. The connection exists in one of three states:
- Setup, in which the request parameters can be set
- Connected, in which request parameters have been sent and the response is expected
- Closed, the final state, in which the HTTP connection as been terminated
The following methods may be invoked only in the Setup state:
- setRequestMethod
- setRequestProperty
The transition from Setup to Connected is caused by any method that requires data to be sent to or received from the server.
The following methods cause the transition to the Connected state when the connection is in Setup state.
- openInputStream
- openDataInputStream
- getLength
- getType
- getEncoding
- getHeaderField
- getResponseCode
- getResponseMessage
- getHeaderFieldInt
- getHeaderFieldDate
- getExpiration
- getDate
- getLastModified
- getHeaderField
- getHeaderFieldKey
The following methods may be invoked while the connection is in Setup or Connected state.
- close
- getRequestMethod
- getRequestProperty
- getURL
- getProtocol
- getHost
- getFile
- getRef
- getPort
- getQuery
After an output stream has been opened by the openOutputStream or openDataOutputStream methods, attempts to change the request parameters via setRequestMethod or the setRequestProperty are ignored. Once the request parameters have been sent, these methods will throw an IOException. When an output stream is closed via the OutputStream.close or DataOutputStream.close methods, the connection enters the Connected state. When the output stream is flushed via the OutputStream.flush or DataOutputStream.flush methods, the request parameters MUST be sent along with any data written to the stream.
The transition to Closed state from any other state is caused by the close method and the closing all of the streams that were opened from the connection.
Example using StreamConnection
Simple read of a URL using StreamConnection. No HTTP specific behavior is needed or used. (Note: this example ignores all HTTP response headers and the HTTP response code. Since a proxy or server may have sent an error response page, an application can not distinquish which data is retreived in the InputStream.)
Connector.open is used to open URL and a StreamConnection is returned. From the StreamConnection the InputStream is opened. It is used to read every character until end of file (-1). If an exception is thrown the connection and stream are closed.
```
     void getViaStreamConnection(String url) throws IOException {
         StreamConnection c = null;
         InputStream s = null;
         try {
             c = (StreamConnection)Connector.open(url);
             s = c.openInputStream();
             int ch;
             while ((ch = s.read()) != -1) {
                 ...
             }
         } finally {
             if (s != null)
                 s.close();
             if (c != null)
                 c.close();
         }
     }
 
```
Example using ContentConnection
Simple read of a URL using ContentConnection. No HTTP specific behavior is needed or used.
Connector.open is used to open url and a ContentConnection is returned. The ContentConnection may be able to provide the length. If the length is available, it is used to read the data in bulk. From the ContentConnection the InputStream is opened. It is used to read every character until end of file (-1). If an exception is thrown the connection and stream are closed.
```
     void getViaContentConnection(String url) throws IOException {
         ContentConnection c = null;
         DataInputStream is = null;
         try {
             c = (ContentConnection)Connector.open(url);
             int len = (int)c.getLength();
             dis = c.openDataInputStream();
             if (len > 0) {
                 byte[] data = new byte[len];
                 dis.readFully(data);
             } else {
                 int ch;
                 while ((ch = dis.read()) != -1) {
                     ...
                 }
             }
         } finally {
             if (dis != null)
                 dis.close();
             if (c != null)
                 c.close();
         }
     }
 
```
Example using HttpConnection
Read the HTTP headers and the data using HttpConnection.
Connector.open is used to open url and a HttpConnection is returned. The HTTP headers are read and processed. If the length is available, it is used to read the data in bulk. From the HttpConnection the InputStream is opened. It is used to read every character until end of file (-1). If an exception is thrown the connection and stream are closed.
```
     void getViaHttpConnection(String url) throws IOException {
         HttpConnection c = null;
         InputStream is = null;
         int rc;

         try {
             c = (HttpConnection)Connector.open(url);

             // Getting the response code will open the connection,
             // send the request, and read the HTTP response headers.
             // The headers are stored until requested.
             rc = c.getResponseCode();
             if (rc != HttpConnection.HTTP_OK) {
                 throw new IOException("HTTP response code: " + rc);
             }

             is = c.openInputStream();

             // Get the ContentType
             String type = c.getType();

             // Get the length and process the data
             int len = (int)c.getLength();
             if (len > 0) {
                 int actual = 0;
                 int bytesread = 0 ;
                 byte[] data = new byte[len];
                 while ((bytesread != len) && (actual != -1)) {
                    actual = is.read(data, bytesread, len - bytesread);
                    bytesread += actual;
                 }
             } else {
                 int ch;
                 while ((ch = is.read()) != -1) {
                     ...
                 }
             }
         } catch (ClassCastException e) {
             throw new IllegalArgumentException("Not an HTTP URL");
         } finally {
             if (is != null)
                 is.close();
             if (c != null)
                 c.close();
         }
     }
 
```
Example using POST with HttpConnection
Post a request with some headers and content to the server and process the headers and content.
Connector.open is used to open url and a HttpConnection is returned. The request method is set to POST and request headers set. A simple command is written and flushed. The HTTP headers are read and processed. If the length is available, it is used to read the data in bulk. From the HttpConnection the InputStream is opened. It is used to read every character until end of file (-1). If an exception is thrown the connection and stream is closed.
```
    void postViaHttpConnection(String url) throws IOException {
        HttpConnection c = null;
        InputStream is = null;
        OutputStream os = null;
        int rc;

        try {
            c = (HttpConnection)Connector.open(url);

            // Set the request method and headers
            c.setRequestMethod(HttpConnection.POST);
            c.setRequestProperty("If-Modified-Since",
                "29 Oct 1999 19:43:31 GMT");
            c.setRequestProperty("User-Agent",
                "Profile/MIDP-2.0 Configuration/CLDC-1.0");
            c.setRequestProperty("Content-Language", "en-US");

            // Getting the output stream may flush the headers
            os = c.openOutputStream();
            os.write("LIST games\n".getBytes());
            os.flush();           // Optional, getResponseCode will flush

            // Getting the response code will open the connection,
            // send the request, and read the HTTP response headers.
            // The headers are stored until requested.
            rc = c.getResponseCode();
            if (rc != HttpConnection.HTTP_OK) {
                throw new IOException("HTTP response code: " + rc);
            }

            is = c.openInputStream();

            // Get the ContentType
            String type = c.getType();
            processType(type);

            // Get the length and process the data
            int len = (int)c.getLength();
            if (len > 0) {
                 int actual = 0;
                 int bytesread = 0 ;
                 byte[] data = new byte[len];
                 while ((bytesread != len) && (actual != -1)) {
                    actual = is.read(data, bytesread, len - bytesread);
                    bytesread += actual;
                 }
                process(data);
            } else {
                int ch;
                while ((ch = is.read()) != -1) {
                    process((byte)ch);
                }
            }
        } catch (ClassCastException e) {
            throw new IllegalArgumentException("Not an HTTP URL");
        } finally {
            if (is != null)
                is.close();
            if (os != null)
                os.close();
            if (c != null)
                c.close();
        }
    }
 
```
Simplified Stream Methods on Connector
Please note the following: The Connector class defines the following convenience methods for retrieving an input or output stream directly for a specified URL:
- InputStream openInputStream(String url)
- DataInputStream openDataInputStream(String url)
- OutputStream openOutputStream(String url)
- DataOutputStream openDataOutputStream(String url)
Please be aware that using these methods implies certain restrictions. You will not get a reference to the actual connection, but rather just references to the input or output stream of the connection. Not having a reference to the connection means that you will not be able to manipulate or query the connection directly. This in turn means that you will not be able to call any of the following methods:
- getRequestMethod()
- setRequestMethod()
- getRequestProperty()
- setRequestProperty()
- getLength()
- getType()
- getEncoding()
- getHeaderField()
- getResponseCode()
- getResponseMessage()
- getHeaderFieldInt
- getHeaderFieldDate
- getExpiration
- getDate
- getLastModified
- getHeaderField
- getHeaderFieldKey
Since:

MIDP 1.0

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`GET` HTTP Get method.
`static String`	`HEAD` HTTP Head method.
`static int`	`HTTP_ACCEPTED` 202: The request has been accepted for processing, but the processing has not been completed.
`static int`	`HTTP_BAD_GATEWAY` 502: The server, while acting as a gateway or proxy, received an invalid response from the upstream server it accessed in attempting to fulfill the request.
`static int`	`HTTP_BAD_METHOD` 405: The method specified in the Request-Line is not allowed for the resource identified by the Request-URI.
`static int`	`HTTP_BAD_REQUEST` 400: The request could not be understood by the server due to malformed syntax.
`static int`	`HTTP_CLIENT_TIMEOUT` 408: The client did not produce a request within the time that the server was prepared to wait.
`static int`	`HTTP_CONFLICT` 409: The request could not be completed due to a conflict with the current state of the resource.
`static int`	`HTTP_CREATED` 201: The request has been fulfilled and resulted in a new resource being created.
`static int`	`HTTP_ENTITY_TOO_LARGE` 413: The server is refusing to process a request because the request entity is larger than the server is willing or able to process.
`static int`	`HTTP_EXPECT_FAILED` 417: The expectation given in an Expect request-header field could not be met by this server, or, if the server is a proxy, the server has unambiguous evidence that the request could not be met by the next-hop server.
`static int`	`HTTP_FORBIDDEN` 403: The server understood the request, but is refusing to fulfill it.
`static int`	`HTTP_GATEWAY_TIMEOUT` 504: The server, while acting as a gateway or proxy, did not receive a timely response from the upstream server specified by the URI or some other auxiliary server it needed to access in attempting to complete the request.
`static int`	`HTTP_GONE` 410: The requested resource is no longer available at the server and no forwarding address is known.
`static int`	`HTTP_INTERNAL_ERROR` 500: The server encountered an unexpected condition which prevented it from fulfilling the request.
`static int`	`HTTP_LENGTH_REQUIRED` 411: The server refuses to accept the request without a defined Content- Length.
`static int`	`HTTP_MOVED_PERM` 301: The requested resource has been assigned a new permanent URI and any future references to this resource SHOULD use one of the returned URIs.
`static int`	`HTTP_MOVED_TEMP` 302: The requested resource resides temporarily under a different URI.
`static int`	`HTTP_MULT_CHOICE` 300: The requested resource corresponds to any one of a set of representations, each with its own specific location, and agent- driven negotiation information is being provided so that the user (or user agent) can select a preferred representation and redirect its request to that location.
`static int`	`HTTP_NO_CONTENT` 204: The server has fulfilled the request but does not need to return an entity-body, and might want to return updated meta-information.
`static int`	`HTTP_NOT_ACCEPTABLE` 406: The resource identified by the request is only capable of generating response entities which have content characteristics not acceptable according to the accept headers sent in the request.
`static int`	`HTTP_NOT_AUTHORITATIVE` 203: The returned meta-information in the entity-header is not the definitive set as available from the origin server.
`static int`	`HTTP_NOT_FOUND` 404: The server has not found anything matching the Request-URI.
`static int`	`HTTP_NOT_IMPLEMENTED` 501: The server does not support the functionality required to fulfill the request.
`static int`	`HTTP_NOT_MODIFIED` 304: If the client has performed a conditional GET request and access is allowed, but the document has not been modified, the server SHOULD respond with this status code.
`static int`	`HTTP_OK` 200: The request has succeeded.
`static int`	`HTTP_PARTIAL` 206: The server has fulfilled the partial GET request for the resource.
`static int`	`HTTP_PAYMENT_REQUIRED` 402: This code is reserved for future use.
`static int`	`HTTP_PRECON_FAILED` 412: The precondition given in one or more of the request-header fields evaluated to false when it was tested on the server.
`static int`	`HTTP_PROXY_AUTH` 407: This code is similar to 401 (Unauthorized), but indicates that the client must first authenticate itself with the proxy.
`static int`	`HTTP_REQ_TOO_LONG` 414: The server is refusing to service the request because the Request-URI is longer than the server is willing to interpret.
`static int`	`HTTP_RESET` 205: The server has fulfilled the request and the user agent SHOULD reset the document view which caused the request to be sent.
`static int`	`HTTP_SEE_OTHER` 303: The response to the request can be found under a different URI and SHOULD be retrieved using a GET method on that resource.
`static int`	`HTTP_TEMP_REDIRECT` 307: The requested resource resides temporarily under a different URI.
`static int`	`HTTP_UNAUTHORIZED` 401: The request requires user authentication.
`static int`	`HTTP_UNAVAILABLE` 503: The server is currently unable to handle the request due to a temporary overloading or maintenance of the server.
`static int`	`HTTP_UNSUPPORTED_RANGE` 416: A server SHOULD return a response with this status code if a request included a Range request-header field , and none of the range-specifier values in this field overlap the current extent of the selected resource, and the request did not include an If-Range request-header field.
`static int`	`HTTP_UNSUPPORTED_TYPE` 415: The server is refusing to service the request because the entity of the request is in a format not supported by the requested resource for the requested method.
`static int`	`HTTP_USE_PROXY` 305: The requested resource MUST be accessed through the proxy given by the Location field.
`static int`	`HTTP_VERSION` 505: The server does not support, or refuses to support, the HTTP protocol version that was used in the request message.
`static String`	`POST` HTTP Post method.

Method Summary

Methods
Modifier and Type	Method and Description
`long`	`getDate()` Returns the value of the `date` header field.
`long`	`getExpiration()` Returns the value of the `expires` header field.
`String`	`getFile()` Returns the file portion of the URL of this `HttpConnection`.
`String`	`getHeaderField(int n)` Gets a header field value by index.
`String`	`getHeaderField(String name)` Returns the value of the named header field.
`long`	`getHeaderFieldDate(String name, long def)` Returns the value of the named field parsed as date.
`int`	`getHeaderFieldInt(String name, int def)` Returns the value of the named field parsed as a number.
`String`	`getHeaderFieldKey(int n)` Gets a header field key by index.
`String`	`getHost()` Returns the host information of the URL of this `HttpConnection`.
`long`	`getLastModified()` Returns the value of the `last-modified` header field.
`int`	`getPort()` Returns the network port number of the URL for this `HttpConnection`.
`String`	`getProtocol()` Returns the protocol name of the URL of this `HttpConnection`.
`String`	`getQuery()` Returns the query portion of the URL of this `HttpConnection`.
`String`	`getRef()` Returns the ref portion of the URL of this `HttpConnection`.
`String`	`getRequestMethod()` Get the current request method.
`String`	`getRequestProperty(String key)` Returns the value of the named general request property for this connection.
`int`	`getResponseCode()` Returns the HTTP response status code.
`String`	`getResponseMessage()` Gets the HTTP response message, if any, returned along with the response code from a server.
`String`	`getURL()` Return a string representation of the URL for this connection.
`void`	`setRequestMethod(String method)` Set the method for the URL request, one of: GET POST HEAD are legal, subject to protocol restrictions.
`void`	`setRequestProperty(String key, String value)` Sets the general request property.

Methods inherited from interface javax.microedition.io.ContentConnection
getEncoding, getLength, getType

Methods inherited from interface javax.microedition.io.InputConnection
openDataInputStream, openInputStream

Methods inherited from interface javax.microedition.io.OutputConnection
openDataOutputStream, openOutputStream

Methods inherited from interface javax.microedition.io.Connection
close

- Field Detail
  - HEAD
```
static final String HEAD
```
    HTTP Head method.
    
    See Also:
    Constant Field Values
  - GET
```
static final String GET
```
    HTTP Get method.
    
    See Also:
    Constant Field Values
  - POST
```
static final String POST
```
    HTTP Post method.
    
    See Also:
    Constant Field Values
  - HTTP_OK
```
static final int HTTP_OK
```
    200: The request has succeeded.
    
    See Also:
    Constant Field Values
  - HTTP_CREATED
```
static final int HTTP_CREATED
```
    201: The request has been fulfilled and resulted in a new resource being created.
    
    See Also:
    Constant Field Values
  - HTTP_ACCEPTED
```
static final int HTTP_ACCEPTED
```
    202: The request has been accepted for processing, but the processing has not been completed.
    
    See Also:
    Constant Field Values
  - HTTP_NOT_AUTHORITATIVE
```
static final int HTTP_NOT_AUTHORITATIVE
```
    203: The returned meta-information in the entity-header is not the definitive set as available from the origin server.
    
    See Also:
    Constant Field Values
  - HTTP_NO_CONTENT
```
static final int HTTP_NO_CONTENT
```
    204: The server has fulfilled the request but does not need to return an entity-body, and might want to return updated meta-information.
    
    See Also:
    Constant Field Values
  - HTTP_RESET
```
static final int HTTP_RESET
```
    205: The server has fulfilled the request and the user agent SHOULD reset the document view which caused the request to be sent.
    
    See Also:
    Constant Field Values
  - HTTP_PARTIAL
```
static final int HTTP_PARTIAL
```
    206: The server has fulfilled the partial GET request for the resource.
    
    See Also:
    Constant Field Values
  - HTTP_MULT_CHOICE
```
static final int HTTP_MULT_CHOICE
```
    300: The requested resource corresponds to any one of a set of representations, each with its own specific location, and agent- driven negotiation information is being provided so that the user (or user agent) can select a preferred representation and redirect its request to that location.
    
    See Also:
    Constant Field Values
  - HTTP_MOVED_PERM
```
static final int HTTP_MOVED_PERM
```
    301: The requested resource has been assigned a new permanent URI and any future references to this resource SHOULD use one of the returned URIs.
    
    See Also:
    Constant Field Values
  - HTTP_MOVED_TEMP
```
static final int HTTP_MOVED_TEMP
```
    302: The requested resource resides temporarily under a different URI. (Note: the name of this status code reflects the earlier publication of RFC2068, which was changed in RFC2616 from "moved temporalily" to "found". The semantics were not changed. The Location header indicates where the application should resend the request.)
    
    See Also:
    Constant Field Values
  - HTTP_SEE_OTHER
```
static final int HTTP_SEE_OTHER
```
    303: The response to the request can be found under a different URI and SHOULD be retrieved using a GET method on that resource.
    
    See Also:
    Constant Field Values
  - HTTP_NOT_MODIFIED
```
static final int HTTP_NOT_MODIFIED
```
    304: If the client has performed a conditional GET request and access is allowed, but the document has not been modified, the server SHOULD respond with this status code.
    
    See Also:
    Constant Field Values
  - HTTP_USE_PROXY
```
static final int HTTP_USE_PROXY
```
    305: The requested resource MUST be accessed through the proxy given by the Location field.
    
    See Also:
    Constant Field Values
  - HTTP_TEMP_REDIRECT
```
static final int HTTP_TEMP_REDIRECT
```
    307: The requested resource resides temporarily under a different URI.
    
    See Also:
    Constant Field Values
  - HTTP_BAD_REQUEST
```
static final int HTTP_BAD_REQUEST
```
    400: The request could not be understood by the server due to malformed syntax.
    
    See Also:
    Constant Field Values
  - HTTP_UNAUTHORIZED
```
static final int HTTP_UNAUTHORIZED
```
    401: The request requires user authentication. The response MUST include a WWW-Authenticate header field containing a challenge applicable to the requested resource.
    
    See Also:
    Constant Field Values
  - HTTP_PAYMENT_REQUIRED
```
static final int HTTP_PAYMENT_REQUIRED
```
    402: This code is reserved for future use.
    
    See Also:
    Constant Field Values
  - HTTP_FORBIDDEN
```
static final int HTTP_FORBIDDEN
```
    403: The server understood the request, but is refusing to fulfill it. Authorization will not help and the request SHOULD NOT be repeated.
    
    See Also:
    Constant Field Values
  - HTTP_NOT_FOUND
```
static final int HTTP_NOT_FOUND
```
    404: The server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent.
    
    See Also:
    Constant Field Values
  - HTTP_BAD_METHOD
```
static final int HTTP_BAD_METHOD
```
    405: The method specified in the Request-Line is not allowed for the resource identified by the Request-URI.
    
    See Also:
    Constant Field Values
  - HTTP_NOT_ACCEPTABLE
```
static final int HTTP_NOT_ACCEPTABLE
```
    406: The resource identified by the request is only capable of generating response entities which have content characteristics not acceptable according to the accept headers sent in the request.
    
    See Also:
    Constant Field Values
  - HTTP_PROXY_AUTH
```
static final int HTTP_PROXY_AUTH
```
    407: This code is similar to 401 (Unauthorized), but indicates that the client must first authenticate itself with the proxy.
    
    See Also:
    Constant Field Values
  - HTTP_CLIENT_TIMEOUT
```
static final int HTTP_CLIENT_TIMEOUT
```
    408: The client did not produce a request within the time that the server was prepared to wait. The client MAY repeat the request without modifications at any later time.
    
    See Also:
    Constant Field Values
  - HTTP_CONFLICT
```
static final int HTTP_CONFLICT
```
    409: The request could not be completed due to a conflict with the current state of the resource.
    
    See Also:
    Constant Field Values
  - HTTP_GONE
```
static final int HTTP_GONE
```
    410: The requested resource is no longer available at the server and no forwarding address is known.
    
    See Also:
    Constant Field Values
  - HTTP_LENGTH_REQUIRED
```
static final int HTTP_LENGTH_REQUIRED
```
    411: The server refuses to accept the request without a defined Content- Length.
    
    See Also:
    Constant Field Values
  - HTTP_PRECON_FAILED
```
static final int HTTP_PRECON_FAILED
```
    412: The precondition given in one or more of the request-header fields evaluated to false when it was tested on the server.
    
    See Also:
    Constant Field Values
  - HTTP_ENTITY_TOO_LARGE
```
static final int HTTP_ENTITY_TOO_LARGE
```
    413: The server is refusing to process a request because the request entity is larger than the server is willing or able to process.
    
    See Also:
    Constant Field Values
  - HTTP_REQ_TOO_LONG
```
static final int HTTP_REQ_TOO_LONG
```
    414: The server is refusing to service the request because the Request-URI is longer than the server is willing to interpret.
    
    See Also:
    Constant Field Values
  - HTTP_UNSUPPORTED_TYPE
```
static final int HTTP_UNSUPPORTED_TYPE
```
    415: The server is refusing to service the request because the entity of the request is in a format not supported by the requested resource for the requested method.
    
    See Also:
    Constant Field Values
  - HTTP_UNSUPPORTED_RANGE
```
static final int HTTP_UNSUPPORTED_RANGE
```
    416: A server SHOULD return a response with this status code if a request included a Range request-header field , and none of the range-specifier values in this field overlap the current extent of the selected resource, and the request did not include an If-Range request-header field.
    
    See Also:
    Constant Field Values
  - HTTP_EXPECT_FAILED
```
static final int HTTP_EXPECT_FAILED
```
    417: The expectation given in an Expect request-header field could not be met by this server, or, if the server is a proxy, the server has unambiguous evidence that the request could not be met by the next-hop server.
    
    See Also:
    Constant Field Values
  - HTTP_INTERNAL_ERROR
```
static final int HTTP_INTERNAL_ERROR
```
    500: The server encountered an unexpected condition which prevented it from fulfilling the request.
    
    See Also:
    Constant Field Values
  - HTTP_NOT_IMPLEMENTED
```
static final int HTTP_NOT_IMPLEMENTED
```
    501: The server does not support the functionality required to fulfill the request.
    
    See Also:
    Constant Field Values
  - HTTP_BAD_GATEWAY
```
static final int HTTP_BAD_GATEWAY
```
    502: The server, while acting as a gateway or proxy, received an invalid response from the upstream server it accessed in attempting to fulfill the request.
    
    See Also:
    Constant Field Values
  - HTTP_UNAVAILABLE
```
static final int HTTP_UNAVAILABLE
```
    503: The server is currently unable to handle the request due to a temporary overloading or maintenance of the server.
    
    See Also:
    Constant Field Values
  - HTTP_GATEWAY_TIMEOUT
```
static final int HTTP_GATEWAY_TIMEOUT
```
    504: The server, while acting as a gateway or proxy, did not receive a timely response from the upstream server specified by the URI or some other auxiliary server it needed to access in attempting to complete the request.
    
    See Also:
    Constant Field Values
  - HTTP_VERSION
```
static final int HTTP_VERSION
```
    505: The server does not support, or refuses to support, the HTTP protocol version that was used in the request message.
    
    See Also:
    Constant Field Values
- Method Detail
  - getURL
```
String getURL()
```
    Return a string representation of the URL for this connection.
    
    Returns:
    the string representation of the URL for this connection.
  - getProtocol
```
String getProtocol()
```
    Returns the protocol name of the URL of this HttpConnection. e.g., http or https
    
    Returns:
    the protocol of the URL of this HttpConnection.
  - getHost
```
String getHost()
```
    Returns the host information of the URL of this HttpConnection. e.g. host name or IPv4 address
    
    Returns:
    the host information of the URL of this HttpConnection.
  - getFile
```
String getFile()
```
    Returns the file portion of the URL of this HttpConnection.
    
    Returns:
    the file portion of the URL of this HttpConnection. null is returned if there is no file.
  - getRef
```
String getRef()
```
    Returns the ref portion of the URL of this HttpConnection. RFC2396 specifies the optional fragment identifier as the the text after the crosshatch (#) character in the URL. This information may be used by the user agent as additional reference information after the resource is successfully retrieved. The format and interpretation of the fragment identifier is dependent on the media type[RFC2046] of the retrieved information.
    
    Returns:
    the ref portion of the URL of this HttpConnection. null is returned if there is no value.
  - getQuery
```
String getQuery()
```
    Returns the query portion of the URL of this HttpConnection. RFC2396 defines the query component as the text after the first question-mark (?) character in the URL.
    
    Returns:
    the query portion of the URL of this HttpConnection. null is returned if there is no value.
  - getPort
```
int getPort()
```
    Returns the network port number of the URL for this HttpConnection.
    
    Returns:
    the network port number of the URL for this HttpConnection. The default HTTP port number (80) is returned if there was no port number in the string passed to Connector.open.
  - getRequestMethod
```
String getRequestMethod()
```
    Get the current request method. e.g. HEAD, GET, POST The default value is GET.
    
    Returns:
    the HTTP request method
    See Also:
    setRequestMethod(java.lang.String)
  - setRequestMethod
```
void setRequestMethod(String method)
                      throws IOException
```
    Set the method for the URL request, one of:
    - GET
    - POST
    - HEAD
    are legal, subject to protocol restrictions. The default method is GET.
    Parameters:
    method - the HTTP method
    
    Throws:
    
    IOException - if the method cannot be reset or if the requested method isn't valid for HTTP.
    See Also:
    getRequestMethod()
  - getRequestProperty
```
String getRequestProperty(String key)
```
    Returns the value of the named general request property for this connection.
    
    Parameters:
    key - the keyword by which the request property is known (e.g., "accept").
    
    Returns:
    the value of the named general request property for this connection. If there is no key with the specified name then null is returned.
    See Also:
    setRequestProperty(java.lang.String, java.lang.String)
  - setRequestProperty
```
void setRequestProperty(String key,
                      String value)
                        throws IOException
```
    Sets the general request property. If a property with the key already exists, overwrite its value with the new value.
    Note: HTTP requires all request properties which can legally have multiple instances with the same key to use a comma-separated list syntax which enables multiple properties to be appended into a single property.
    
    Parameters:
    key - the keyword by which the request is known (e.g., "accept").
    value - the value associated with it.
    
    Throws:
    
    IOException - is thrown if the connection is in the connected state.
    See Also:
    getRequestProperty(java.lang.String)
  - getResponseCode
```
int getResponseCode()
                    throws IOException
```
    Returns the HTTP response status code. It parses responses like:
```
 HTTP/1.0 200 OK
 HTTP/1.0 401 Unauthorized
 
```
    and extracts the ints 200 and 401 respectively. from the response (i.e., the response is not valid HTTP).
    Returns:
    the HTTP Status-Code or -1 if no status code can be discerned.
    
    Throws:
    
    IOException - if an error occurred connecting to the server.
  - getResponseMessage
```
String getResponseMessage()
                          throws IOException
```
    Gets the HTTP response message, if any, returned along with the response code from a server. From responses like:
```
 HTTP/1.0 200 OK
 HTTP/1.0 404 Not Found
 
```
    Extracts the Strings "OK" and "Not Found" respectively. Returns null if none could be discerned from the responses (the result was not valid HTTP).
    Returns:
    the HTTP response message, or null
    
    Throws:
    
    IOException - if an error occurred connecting to the server.
  - getExpiration
```
long getExpiration()
                   throws IOException
```
    Returns the value of the expires header field.
    
    Returns:
    the expiration date of the resource that this URL references, or 0 if not known. The value is the number of milliseconds since January 1, 1970 GMT.
    
    Throws:
    
    IOException - if an error occurred connecting to the server.
  - getDate
```
long getDate()
             throws IOException
```
    Returns the value of the date header field.
    
    Returns:
    the sending date of the resource that the URL references, or 0 if not known. The value returned is the number of milliseconds since January 1, 1970 GMT.
    
    Throws:
    
    IOException - if an error occurred connecting to the server.
  - getLastModified
```
long getLastModified()
                     throws IOException
```
    Returns the value of the last-modified header field. The result is the number of milliseconds since January 1, 1970 GMT.
    
    Returns:
    the date the resource referenced by this HttpConnection was last modified, or 0 if not known.
    
    Throws:
    
    IOException - if an error occurred connecting to the server.
  - getHeaderField
```
String getHeaderField(String name)
                      throws IOException
```
    Returns the value of the named header field.
    
    Parameters:
    name - of a header field.
    
    Returns:
    the value of the named header field, or null if there is no such field in the header.
    
    Throws:
    
    IOException - if an error occurred connecting to the server.
  - getHeaderFieldInt
```
int getHeaderFieldInt(String name,
                    int def)
                      throws IOException
```
    Returns the value of the named field parsed as a number.
    This form of getHeaderField exists because some connection types (e.g., http-ng) have pre-parsed headers. Classes for that connection type can override this method and short-circuit the parsing.
    
    Parameters:
    name - the name of the header field.
    def - the default value.
    
    Returns:
    the value of the named field, parsed as an integer. The def value is returned if the field is missing or malformed.
    
    Throws:
    
    IOException - if an error occurred connecting to the server.
  - getHeaderFieldDate
```
long getHeaderFieldDate(String name,
                      long def)
                        throws IOException
```
    Returns the value of the named field parsed as date. The result is the number of milliseconds since January 1, 1970 GMT represented by the named field.
    This form of getHeaderField exists because some connection types (e.g., http-ng) have pre-parsed headers. Classes for that connection type can override this method and short-circuit the parsing.
    
    Parameters:
    name - the name of the header field.
    def - a default value.
    
    Returns:
    the value of the field, parsed as a date. The value of the def argument is returned if the field is missing or malformed.
    
    Throws:
    
    IOException - if an error occurred connecting to the server.
  - getHeaderField
```
String getHeaderField(int n)
                      throws IOException
```
    Gets a header field value by index.
    
    Parameters:
    n - the index of the header field
    
    Returns:
    the value of the nth header field or null if the array index is out of range. An empty String is returned if the field does not have a value.
    
    Throws:
    
    IOException - if an error occurred connecting to the server.
  - getHeaderFieldKey
```
String getHeaderFieldKey(int n)
                         throws IOException
```
    Gets a header field key by index.
    
    Parameters:
    n - the index of the header field
    
    Returns:
    the key of the nth header field or null if the array index is out of range.
    
    Throws:
    
    IOException - if an error occurred connecting to the server.

Interface HttpConnection

Field Summary

Method Summary

Methods inherited from interface javax.microedition.io.ContentConnection

Methods inherited from interface javax.microedition.io.InputConnection

Methods inherited from interface javax.microedition.io.OutputConnection

Methods inherited from interface javax.microedition.io.Connection

Field Detail

HEAD

GET

POST

HTTP_OK

HTTP_CREATED

HTTP_ACCEPTED

HTTP_NOT_AUTHORITATIVE

HTTP_NO_CONTENT

HTTP_RESET

HTTP_PARTIAL

HTTP_MULT_CHOICE

HTTP_MOVED_PERM

HTTP_MOVED_TEMP

HTTP_SEE_OTHER

HTTP_NOT_MODIFIED

HTTP_USE_PROXY

HTTP_TEMP_REDIRECT

HTTP_BAD_REQUEST

HTTP_UNAUTHORIZED

HTTP_PAYMENT_REQUIRED

HTTP_FORBIDDEN

HTTP_NOT_FOUND

HTTP_BAD_METHOD

HTTP_NOT_ACCEPTABLE

HTTP_PROXY_AUTH

HTTP_CLIENT_TIMEOUT

HTTP_CONFLICT

HTTP_GONE

HTTP_LENGTH_REQUIRED

HTTP_PRECON_FAILED

HTTP_ENTITY_TOO_LARGE

HTTP_REQ_TOO_LONG

HTTP_UNSUPPORTED_TYPE

HTTP_UNSUPPORTED_RANGE

HTTP_EXPECT_FAILED

HTTP_INTERNAL_ERROR

HTTP_NOT_IMPLEMENTED

HTTP_BAD_GATEWAY

HTTP_UNAVAILABLE

HTTP_GATEWAY_TIMEOUT

HTTP_VERSION

Method Detail

getURL

getProtocol

getHost

getFile

getRef

getQuery

getPort

getRequestMethod

setRequestMethod

getRequestProperty

setRequestProperty

getResponseCode

getResponseMessage

getExpiration

getDate

getLastModified

getHeaderField

getHeaderFieldInt

getHeaderFieldDate

getHeaderField

getHeaderFieldKey