private Request buildRequest()

in src/main/java/com/aliyun/oss/common/comm/ServiceClient.java [215:284]
49 lines of code
14 McCabe index (conditional complexity)

    private Request buildRequest(RequestMessage requestMessage, ExecutionContext context) throws ClientException {

        Request request = new Request();
        request.setMethod(requestMessage.getMethod());
        request.setUseChunkEncoding(requestMessage.isUseChunkEncoding());

        if (requestMessage.isUseUrlSignature()) {
            request.setUrl(requestMessage.getAbsoluteUrl().toString());
            request.setUseUrlSignature(true);

            request.setContent(requestMessage.getContent());
            request.setContentLength(requestMessage.getContentLength());
            request.setHeaders(requestMessage.getHeaders());

            return request;
        }

        request.setHeaders(requestMessage.getHeaders());
        // The header must be converted after the request is signed,
        // otherwise the signature will be incorrect.
        if (request.getHeaders() != null) {
            HttpUtil.convertHeaderCharsetToIso88591(request.getHeaders());
        }

        final String delimiter = "/";
        String uri = requestMessage.getEndpoint().toString();
        if (!uri.endsWith(delimiter) && (requestMessage.getResourcePath() == null
                || !requestMessage.getResourcePath().startsWith(delimiter))) {
            uri += delimiter;
        }

        if (requestMessage.getResourcePath() != null) {
            uri += requestMessage.getResourcePath();
        }

        String paramString = HttpUtil.paramToQueryString(requestMessage.getParameters(), context.getCharset());

        /*
         * For all non-POST requests, and any POST requests that already have a
         * payload, we put the encoded params directly in the URI, otherwise,
         * we'll put them in the POST request's payload.
         */
        boolean requestHasNoPayload = requestMessage.getContent() != null;
        boolean requestIsPost = requestMessage.getMethod() == HttpMethod.POST;
        boolean putParamsInUri = !requestIsPost || requestHasNoPayload;
        if (paramString != null && putParamsInUri) {
            uri += "?" + paramString;
        }

        request.setUrl(uri);

        if (requestIsPost && requestMessage.getContent() == null && paramString != null) {
            // Put the param string to the request body if POSTing and
            // no content.
            try {
                byte[] buf = paramString.getBytes(context.getCharset());
                ByteArrayInputStream content = new ByteArrayInputStream(buf);
                request.setContent(content);
                request.setContentLength(buf.length);
            } catch (UnsupportedEncodingException e) {
                throw new RuntimeException(
                        COMMON_RESOURCE_MANAGER.getFormattedString("EncodingFailed", e.getMessage()));
            }
        } else {
            request.setContent(requestMessage.getContent());
            request.setContentLength(requestMessage.getContentLength());
        }

        return request;
    }