Examples with HttpMethods org.apache.camel.component.http4.HttpMethods used on opensource projects

Example 1 with HttpMethods

use of org.apache.camel.component.http4.HttpMethods in project camel by apache.

the class HttpMethodHelper method createMethod.

/**
     * Creates the HttpMethod to use to call the remote server, often either its GET or POST.
     *
     * @param exchange the exchange
     * @return the created method
     * @throws URISyntaxException 
     */
public static HttpMethods createMethod(Exchange exchange, HttpEndpoint endpoint, boolean hasPayload) throws URISyntaxException {
    // is a query string provided in the endpoint URI or in a header (header
    // overrules endpoint)
    String queryString = exchange.getIn().getHeader(Exchange.HTTP_QUERY, String.class);
    // We need also check the HTTP_URI header query part
    String uriString = exchange.getIn().getHeader(Exchange.HTTP_URI, String.class);
    // resolve placeholders in uriString
    try {
        uriString = exchange.getContext().resolvePropertyPlaceholders(uriString);
    } catch (Exception e) {
        throw new RuntimeExchangeException("Cannot resolve property placeholders with uri: " + uriString, exchange, e);
    }
    if (uriString != null) {
        // in case the URI string contains unsafe characters
        uriString = UnsafeUriCharactersEncoder.encodeHttpURI(uriString);
        URI uri = new URI(uriString);
        queryString = uri.getQuery();
    }
    if (queryString == null) {
        queryString = endpoint.getHttpUri().getRawQuery();
    }
    // compute what method to use either GET or POST
    HttpMethods answer;
    if (endpoint.getHttpMethod() != null) {
        // endpoint configured take precedence
        answer = HttpMethods.valueOf(endpoint.getHttpMethod().name());
    } else {
        // compute what method to use either GET or POST (header take precedence)
        HttpMethods m = exchange.getIn().getHeader(Exchange.HTTP_METHOD, HttpMethods.class);
        if (m != null) {
            // always use what end-user provides in a header
            answer = m;
        } else if (queryString != null) {
            // if a query string is provided then use GET
            answer = HttpMethods.GET;
        } else {
            // fallback to POST if we have payload, otherwise GET
            answer = hasPayload ? HttpMethods.POST : HttpMethods.GET;
        }
    }
    return answer;
}