httpurlconnection.java

Light in the box 抓取程序。 使用HttpClient

    }

    /**
     * Return the header field at the specified position
     * @param position The position
     * @return The header field.
     * @see java.net.HttpURLConnection#getHeaderField(int)
     * @see org.apache.commons.httpclient.HttpMethod#getResponseHeaders()
     */
    public String getHeaderField(int position) {
        LOG.trace("enter HttpURLConnection.getHeaderField(int)");

        // Note: HttpClient does not consider the returned Status Line as
        // a response header. However, getHeaderField(0) is supposed to 
        // return the status line. Hence the special case below ...
        
        if (position == 0) {
            return this.method.getStatusLine().toString();
        }

        // Note: HttpClient does not currently keep headers in the same order
        // that they are read from the HTTP server.

        Header[] headers = this.method.getResponseHeaders();
        if (position < 0 || position > headers.length) {
            return null;
        }

        return headers[position - 1].getValue();
    }

    /**
     * Return the URL
     * @return The URL.
     * @see java.net.HttpURLConnection#getURL()
     */
    public URL getURL() {
        LOG.trace("enter HttpURLConnection.getURL()");
        return this.url;
    }

    // Note: We don't implement the following methods so that they default to
    // the JDK implementation. They will all call
    // <code>getHeaderField(String)</code> which we have overridden.

    // java.net.HttpURLConnection#getHeaderFieldDate(String, long)
    // java.net.HttpURLConnection#getContentLength()
    // java.net.HttpURLConnection#getContentType()
    // java.net.HttpURLConnection#getContentEncoding()
    // java.net.HttpURLConnection#getDate()
    // java.net.HttpURLConnection#getHeaderFieldInt(String, int)
    // java.net.HttpURLConnection#getExpiration()
    // java.net.HttpURLConnection#getLastModified()

    /**
     * Not available: the data must have already been retrieved.
     */
    public void setInstanceFollowRedirects(boolean isFollowingRedirects) {
        LOG.trace("enter HttpURLConnection.setInstanceFollowRedirects(boolean)");
        throw new RuntimeException("This class can only be used with already"
            + "retrieved data");
    }

    /**
     * Not yet implemented.
     */
    public boolean getInstanceFollowRedirects() {
        LOG.trace("enter HttpURLConnection.getInstanceFollowRedirects()");
        throw new RuntimeException("Not implemented yet");
    }

    /**
     * Not available: the data must have already been retrieved.
     * @see java.net.HttpURLConnection#setRequestMethod(String)
     */
    public void setRequestMethod(String method) throws ProtocolException {
        LOG.trace("enter HttpURLConnection.setRequestMethod(String)");
        throw new RuntimeException("This class can only be used with already"
            + "retrieved data");
    }

    /**
     * Not yet implemented.
     * @see java.net.HttpURLConnection#getPermission()
     */
    public Permission getPermission() throws IOException {
        LOG.trace("enter HttpURLConnection.getPermission()");
        throw new RuntimeException("Not implemented yet");
    }

    /**
     * Not yet implemented.
     * @see java.net.HttpURLConnection#getContent()
     */
    public Object getContent() throws IOException {
        LOG.trace("enter HttpURLConnection.getContent()");
        throw new RuntimeException("Not implemented yet");
    }

    /**
     * Not yet implemented.
     */
    public Object getContent(Class[] classes) throws IOException {
        LOG.trace("enter HttpURLConnection.getContent(Class[])");
        throw new RuntimeException("Not implemented yet");
    }

    /**
     * @see java.net.HttpURLConnection#getOutputStream()
     */
    public OutputStream getOutputStream() throws IOException {
        LOG.trace("enter HttpURLConnection.getOutputStream()");
        throw new RuntimeException("This class can only be used with already"
            + "retrieved data");
    }

    /**
     * Not available: the data must have already been retrieved.
     * @see java.net.HttpURLConnection#setDoInput(boolean)
     */
    public void setDoInput(boolean isInput) {
        LOG.trace("enter HttpURLConnection.setDoInput()");
        throw new RuntimeException("This class can only be used with already"
            + "retrieved data");
    }

    /**
     * Not yet implemented.
     * @see java.net.HttpURLConnection#getDoInput()
     */
    public boolean getDoInput() {
        LOG.trace("enter HttpURLConnection.getDoInput()");
        throw new RuntimeException("Not implemented yet");
    }

    /**
     * Not available: the data must have already been retrieved.
     * @see java.net.HttpURLConnection#setDoOutput(boolean)
     */
    public void setDoOutput(boolean isOutput) {
        LOG.trace("enter HttpURLConnection.setDoOutput()");
        throw new RuntimeException("This class can only be used with already"
            + "retrieved data");
    }

    /**
     * Not yet implemented.
     * @see java.net.HttpURLConnection#getDoOutput()
     */
    public boolean getDoOutput() {
        LOG.trace("enter HttpURLConnection.getDoOutput()");
        throw new RuntimeException("Not implemented yet");
    }

    /**
     * Not available: the data must have already been retrieved.
     * @see java.net.HttpURLConnection#setAllowUserInteraction(boolean)
     */
    public void setAllowUserInteraction(boolean isAllowInteraction) {
        LOG.trace("enter HttpURLConnection.setAllowUserInteraction(boolean)");
        throw new RuntimeException("This class can only be used with already"
            + "retrieved data");
    }

    /**
     * Not yet implemented.
     * @see java.net.HttpURLConnection#getAllowUserInteraction()
     */
    public boolean getAllowUserInteraction() {
        LOG.trace("enter HttpURLConnection.getAllowUserInteraction()");
        throw new RuntimeException("Not implemented yet");
    }

    /**
     * Not available: the data must have already been retrieved.
     * @see java.net.HttpURLConnection#setUseCaches(boolean)
     */
    public void setUseCaches(boolean isUsingCaches) {
        LOG.trace("enter HttpURLConnection.setUseCaches(boolean)");
        throw new RuntimeException("This class can only be used with already"
            + "retrieved data");
    }

    /**
     * Not yet implemented.
     * @see java.net.HttpURLConnection#getUseCaches()
     */
    public boolean getUseCaches() {
        LOG.trace("enter HttpURLConnection.getUseCaches()");
        throw new RuntimeException("Not implemented yet");
    }

    /**
     * Not available: the data must have already been retrieved.
     * @see java.net.HttpURLConnection#setIfModifiedSince(long)
     */
    public void setIfModifiedSince(long modificationDate) {
        LOG.trace("enter HttpURLConnection.setIfModifiedSince(long)");
        throw new RuntimeException("This class can only be used with already"
            + "retrieved data");
    }

    /**
     * Not yet implemented.
     * @see java.net.HttpURLConnection#getIfModifiedSince()
     */
    public long getIfModifiedSince() {
        LOG.trace("enter HttpURLConnection.getIfmodifiedSince()");
        throw new RuntimeException("Not implemented yet");
    }

    /**
     * Not available: the data must have already been retrieved.
     * @see java.net.HttpURLConnection#getDefaultUseCaches()
     */
    public boolean getDefaultUseCaches() {
        LOG.trace("enter HttpURLConnection.getDefaultUseCaches()");
        throw new RuntimeException("Not implemented yet");
    }

    /**
     * Not available: the data must have already been retrieved.
     * @see java.net.HttpURLConnection#setDefaultUseCaches(boolean)
     */
    public void setDefaultUseCaches(boolean isUsingCaches) {
        LOG.trace("enter HttpURLConnection.setDefaultUseCaches(boolean)");
        throw new RuntimeException("This class can only be used with already"
            + "retrieved data");
    }

    /**
     * Not available: the data must have already been retrieved.
     * @see java.net.HttpURLConnection#setRequestProperty(String,String)
     */
    public void setRequestProperty(String key, String value) {
        LOG.trace("enter HttpURLConnection.setRequestProperty()");
        throw new RuntimeException("This class can only be used with already"
            + "retrieved data");
    }

    /**
     * Not yet implemented.
     * @see java.net.HttpURLConnection#getRequestProperty(String)
     */
    public String getRequestProperty(String key) {
        LOG.trace("enter HttpURLConnection.getRequestProperty()");
        throw new RuntimeException("Not implemented yet");
    }

}