Example usage for org.apache.commons.httpclient Header getValues

Introduction

In this page you can find the example usage for org.apache.commons.httpclient Header getValues.

Prototype

public HeaderElement[] getValues() throws HttpException 

Source Link

Usage

From source file:de.innovationgate.igutils.pingback.PingBackClient.java

private String determinePingBackURI(String targetURI) throws PingBackException {
    HttpClient client = WGFactory.getHttpClientFactory().createHttpClient();
    GetMethod pingbackTargetGET = new GetMethod(targetURI);
    pingbackTargetGET.setFollowRedirects(false);
    try {/*from   ww  w  .  j a va 2  s.co  m*/
        int responseCode = client.executeMethod(pingbackTargetGET);
        if (responseCode != HttpURLConnection.HTTP_OK) {
            if (responseCode == HttpURLConnection.HTTP_FORBIDDEN) {
                throw new PingBackException(PingBackException.ERROR_ACCESS_DENIED,
                        "Access denied on target '" + targetURI + "'.");
            } else if (responseCode == HttpURLConnection.HTTP_BAD_GATEWAY) {
                throw new PingBackException(PingBackException.ERROR_UPSTREAM_SERVER_COMMUNICATION_ERROR,
                        "Unable to determine ping back target for post. Get request on '" + targetURI
                                + "' returned '" + responseCode + "'.");
            } else {
                throw new PingBackException(PingBackException.ERROR_TARGET_URI_CANNOT_BE_USED_AS_TARGET,
                        "Unable to determine ping back target for post. Get request on '" + targetURI
                                + "' returned '" + responseCode + "'.");
            }
        }

        Header header = pingbackTargetGET.getResponseHeader("X-Pingback");
        if (header != null && header.getValues().length > 0) {
            // retrieve ping back url from header
            HeaderElement headerElement = header.getValues()[0];
            return headerElement.getName();
        } else {
            // retrieve ping back url from link tag

            // check for textual content
            checkTextualContentType(pingbackTargetGET);

            // retrieve input reader an try to find link tag
            InputStream sourceIn = pingbackTargetGET.getResponseBodyAsStream();
            String searchTerm = "<link rel=\"pingback\" href=\"";
            if (sourceIn == null) {
                throw new PingBackException(PingBackException.ERROR_TARGET_URI_CANNOT_BE_USED_AS_TARGET,
                        "TargetURL '" + targetURI + "' cannot be parsed for link tag.");
            } else {
                BufferedReader reader = new BufferedReader(new InputStreamReader(
                        pingbackTargetGET.getResponseBodyAsStream(), pingbackTargetGET.getResponseCharSet()));
                String line = reader.readLine();
                while (line != null) {
                    String orgLine = line;
                    line = line.toLowerCase();
                    int start = line.indexOf(searchTerm);
                    if (start != -1) {
                        if (start + searchTerm.length() <= line.length()) {
                            start = start + searchTerm.length();
                            int end = line.indexOf("\"", start);
                            if (end != -1) {
                                String href = orgLine.substring(start, end);
                                href = href.replaceAll("&amp;", "&");
                                href = href.replaceAll("&lt;", "<");
                                href = href.replaceAll("&gt;", ">");
                                href = href.replaceAll("&quot;", "\"");
                                return href;
                            } else {
                                throw new PingBackException(
                                        PingBackException.ERROR_TARGET_URI_CANNOT_BE_USED_AS_TARGET,
                                        "TargetURL '" + targetURI + "' returned an unparsable link-tag");
                            }
                        } else {
                            throw new PingBackException(
                                    PingBackException.ERROR_TARGET_URI_CANNOT_BE_USED_AS_TARGET,
                                    "TargetURL '" + targetURI + "' returned an unparsable link-tag");
                        }
                    }
                    // if endof head reached - cancel search
                    if (line.indexOf("</head>") != -1 || line.indexOf("<body>") != -1) {
                        throw new PingBackException(PingBackException.ERROR_TARGET_URI_CANNOT_BE_USED_AS_TARGET,
                                "TargetURL '" + targetURI + "' is not pingback-enabled.");
                    }
                    line = reader.readLine();
                }
                throw new PingBackException(PingBackException.ERROR_TARGET_URI_CANNOT_BE_USED_AS_TARGET,
                        "TargetURL '" + targetURI + "' is not pingback-enabled.");
            }
        }
    } catch (HttpException e) {
        throw new PingBackException(PingBackException.ERROR_GENERIC,
                "Unable to determine ping back target for post.", e);
    } catch (IOException e) {
        throw new PingBackException(PingBackException.ERROR_GENERIC,
                "Unable to determine ping back target for post.", e);
    }
}

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From source file:edu.umd.cs.buildServer.BuildServerDaemon.java

/**
 * Get a required header value. If the header value isn't specified in the
 * server response, returns null.//from   w w  w  .  j a v  a  2  s . c o  m
 *
 * @param method
 *            the HttpMethod representing the request/response
 * @param headerName
 *            the name of the header
 * @return the value of the header, or null if the header isn't present
 * @throws HttpException
 */
private String getRequiredHeaderValue(HttpMethod method, String headerName) throws HttpException {
    Header header = method.getResponseHeader(headerName);
    if (header == null || header.getValues().length != 1) {
        getLog().error("Internal error: Missing header " + headerName + " in submit server response");
        for (Header h : method.getResponseHeaders()) {
            getLog().error("  have header " + h.getName());
        }
        return null;
    }
    return header.getValue();
}

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From source file:edu.umd.cs.buildServer.BuildServerDaemon.java

/**
 * Get a required header value. If the header value isn't specified in the
 * server response, returns null.//w w w  .  j  a va  2  s  . com
 *
 * @param method
 *            the HttpMethod representing the request/response
 * @param headerName
 *            the name of the header
 * @return the value of the header, or null if the header isn't present
 * @throws HttpException
 */
private String getRequiredHeaderValue(HttpMethod method, String headerName, String alternativeHeaderName)
        throws HttpException {
    Header header = method.getResponseHeader(headerName);
    if (header == null || header.getValues().length != 1)
        header = method.getResponseHeader(alternativeHeaderName);
    if (header == null || header.getValues().length != 1) {
        getLog().error("Internal error: Missing header " + headerName + " in submit server response");
        for (Header h : method.getResponseHeaders()) {
            getLog().error("  have header " + h.getName());
        }
        return null;
    }
    return header.getValue();
}

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