Example usage for com.squareup.okhttp.internal.http HttpEngine MAX_FOLLOW_UPS

Introduction

In this page you can find the example usage for com.squareup.okhttp.internal.http HttpEngine MAX_FOLLOW_UPS.

Prototype

int MAX_FOLLOW_UPS

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Document

How many redirects and auth challenges should we attempt?

Usage

From source file:io.apiman.gateway.platforms.servlet.connectors.ok.HttpURLConnectionImpl.java

License:Apache License

/**
 * Aggressively tries to get the final HTTP response, potentially making
 * many HTTP requests in the process in order to cope with redirects and
 * authentication./*w w  w.  j  a  va 2s.co  m*/
 */
private HttpEngine getResponse() throws IOException {
    initHttpEngine();

    if (httpEngine.hasResponse()) {
        return httpEngine;
    }

    while (true) {
        if (!execute(true)) {
            continue;
        }

        Response response = httpEngine.getResponse();
        Request followUp = httpEngine.followUpRequest();

        if (followUp == null) {
            httpEngine.releaseConnection();
            return httpEngine;
        }

        if (++followUpCount > HttpEngine.MAX_FOLLOW_UPS) {
            throw new ProtocolException("Too many follow-up requests: " + followUpCount);
        }

        // The first request was insufficient. Prepare for another...
        url = followUp.url();
        requestHeaders = followUp.headers().newBuilder();

        // Although RFC 2616 10.3.2 specifies that a HTTP_MOVED_PERM redirect
        // should keep the same method, Chrome, Firefox and the RI all issue GETs
        // when following any redirect.
        Sink requestBody = httpEngine.getRequestBody();
        if (!followUp.method().equals(method)) {
            requestBody = null;
        }

        if (requestBody != null && !(requestBody instanceof RetryableSink)) {
            throw new HttpRetryException("Cannot retry streamed HTTP body", responseCode);
        }

        if (!httpEngine.sameConnection(followUp.url())) {
            httpEngine.releaseConnection();
        }

        Connection connection = httpEngine.close();
        httpEngine = newHttpEngine(followUp.method(), connection, (RetryableSink) requestBody, response);
    }
}

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