Android_WebServices_原始碼分析

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本博文為子墨原創，轉載請註明出處！ http://blog.csdn.net/zimo2013/article/details/38037989在 Android_WebServices_介紹一文中，簡介了WebServices的基礎知識。以下主要分析 ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar實現原始碼。1.調用WebServices流程

public void getRemoteInfo(String phoneSec) {String nameSpace = "http://WebXml.com.cn/";String methodName = "getMobileCodeInfo";String endPoint = "http://webservice.webxml.com.cn/WebServices/MobileCodeWS.asmx";String soapAction = "http://WebXml.com.cn/getMobileCodeInfo";// 1.初始化 SoapObject對象。為該方法設定參數。相當於信體SoapObject request = new SoapObject(nameSpace, methodName);request.addProperty("mobileCode", phoneSec);request.addProperty("userId", "");// 2.執行個體化SoapSerializationEnvelope對象，相當於信皮SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER10);envelope.bodyOut = request;envelope.dotNet = true;//相容.net開發的Net-Services// 3.執行個體化HttpTransportSE對象，還能夠指定放了訪問的請求時間HttpTransportSE transport = new HttpTransportSE(endPoint);//HttpTransportSE transport = new HttpTransportSE(endPoint, timeout)；try {// 4.核心方法調用，當中soapActon在SoapSerializationEnvelope.VER12時無效，且為POST請求transport.call(soapAction, envelope);SoapObject response = (SoapObject) envelope.bodyIn;final String result = response.getProperty(0).toString();//Vectortoast(result);} catch (Exception e) {e.printStackTrace();toast(e.getMessage());}}

2.transport.call關鍵原始碼分析

/** * Perform a soap call with a given namespace and the given envelope providing * any extra headers that the user requires such as cookies. Headers that are * returned by the web service will be returned to the caller in the form of a * <code>List</code> of <code>HeaderProperty</code> instances. * * @param soapAction *            the namespace with which to perform the call in. * @param envelope *            the envelope the contains the information for the call. * @param headers *   <code>List</code> of <code>HeaderProperty</code> headers to send with the SOAP request. * @param outputFile *              a file to stream the response into rather than parsing it, streaming happens when file is not null * * @return Headers returned by the web service as a <code>List</code> of * <code>HeaderProperty</code> instances. * * @throws HttpResponseException *              an IOException when Http response code is different from 200 */public List call(String soapAction, SoapEnvelope envelope, List headers, File outputFile)    throws HttpResponseException, IOException, XmlPullParserException {    if (soapAction == null) {        soapAction = "\"\"";    }    //依據envelope，將其序列化為一個請求位元組數組    byte[] requestData = createRequestData(envelope, "UTF-8");    // debug=true, requestDump的值為請求的資料，方便調試    requestDump = debug ?
 new String(requestData) : null;    responseDump = null;    //connection = new ServiceConnectionSE(proxy, url, timeout);包含設定時間    ServiceConnection connection = getServiceConnection();    connection.setRequestProperty("User-Agent", USER_AGENT);    // SOAPAction is not a valid header for VER12 so do not add    // it    // @see "http://code.google.com/p/ksoap2-android/issues/detail?
id=67    if (envelope.version != SoapSerializationEnvelope.VER12) {        connection.setRequestProperty("SOAPAction", soapAction);    }    if (envelope.version == SoapSerializationEnvelope.VER12) {        connection.setRequestProperty("Content-Type", CONTENT_TYPE_SOAP_XML_CHARSET_UTF_8);    } else {        connection.setRequestProperty("Content-Type", CONTENT_TYPE_XML_CHARSET_UTF_8);    }    // this seems to cause issues so we are removing it    //connection.setRequestProperty("Connection", "close");    connection.setRequestProperty("Accept-Encoding", "gzip");    // Pass the headers provided by the user along with the call    if (headers != null) {        for (int i = 0; i < headers.size(); i++) {            HeaderProperty hp = (HeaderProperty) headers.get(i);            connection.setRequestProperty(hp.getKey(), hp.getValue());        }    }    // POST請求    connection.setRequestMethod("POST");    //發送資料。耗時較長，將requestData發送至connection的輸出資料流    sendData(requestData, connection, envelope);        requestData = null;    InputStream is = null;    List retHeaders = null;    byte[] buf = null; // To allow releasing the resource after used    int contentLength = 8192; // To determine the size of the response and adjust buffer size    boolean gZippedContent = false;    boolean xmlContent = false;    // 得到響應碼    int status = connection.getResponseCode();    try {    //得到回應標頭        retHeaders = connection.getResponseProperties();        for (int i = 0; i < retHeaders.size(); i++) {            HeaderProperty hp = (HeaderProperty)retHeaders.get(i);            // HTTP response code has null key            if (null == hp.getKey()) {                continue;            }            // If we know the size of the response, we should use the size to initiate vars            if (hp.getKey().equalsIgnoreCase("content-length") ) {                if ( hp.getValue() != null ) {                    try {                        contentLength = Integer.parseInt( hp.getValue() );                    } catch ( NumberFormatException nfe ) {                        contentLength = 8192;                    }                }            }            // Check the content-type header to see if we‘re getting back XML, in case of a            // SOAP fault on 500 codes            if (hp.getKey().equalsIgnoreCase("Content-Type")                    && hp.getValue().contains("xml")) {                xmlContent = true;            }            // ignoring case since users found that all smaller case is used on some server            // and even if it is wrong according to spec, we rather have it work..            if (hp.getKey().equalsIgnoreCase("Content-Encoding")                 && hp.getValue().equalsIgnoreCase("gzip")) {                gZippedContent = true;            }        }        //first check the response code....        if (status != 200) {            //throw new IOException("HTTP request failed, HTTP status: " + status);            throw new HttpResponseException("HTTP request failed, HTTP status: " + status, status);        }        if (contentLength > 0) {            if (gZippedContent) {                is = getUnZippedInputStream(                        new BufferedInputStream(connection.openInputStream(),contentLength));            } else {                is = new BufferedInputStream(connection.openInputStream(),contentLength);            }        }    } catch (IOException e) {        if (contentLength > 0) {            if(gZippedContent) {                is = getUnZippedInputStream(                        new BufferedInputStream(connection.getErrorStream(),contentLength));            } else {                is = new BufferedInputStream(connection.getErrorStream(),contentLength);            }        }        if ( e instanceof HttpResponseException) {            if (!xmlContent) {                if (debug && is != null) {                    //go ahead and read the error stream into the debug buffers/file if needed.                    readDebug(is, contentLength, outputFile);                }                //we never want to drop through to attempting to parse the HTTP error stream as a SOAP response.                connection.disconnect();                throw e;            }        }    }    // debug=true responseDump=響應資料，方便調試    if (debug) {        is = readDebug(is, contentLength, outputFile);    }    // 依據is流，將流資料解析至 envelope.bodyIn中去    parseResponse(envelope, is,retHeaders);    //釋放資源    is = null;    buf = null;    connection.disconnect();    connection = null;    // 返迴響應頭    return retHeaders;}

執行個體下載http://download.csdn.net/detail/strawberry2013/7663399

Android_WebServices_原始碼分析