Fix the issue encountered when the value of queries starting with '{' (…

…OpenFeign#555)

support the query values starting with {, when use RibbonClient。different from OpenFeign#540.

ribbon/src/main/java/feign/ribbon/LBClient.java

@@ -27,13 +27,16 @@
 
 import java.io.IOException;
 import java.net.URI;
+import java.util.Arrays;
 import java.util.Collection;
+import java.util.LinkedHashMap;
 import java.util.Map;
 
 import feign.Client;
 import feign.Request;
 import feign.RequestTemplate;
 import feign.Response;
+import feign.Util;
 
 public final class LBClient extends
     AbstractLoadBalancerAwareClient<LBClient.RibbonRequest, LBClient.RibbonResponse> {
@@ -94,12 +97,14 @@ static class RibbonRequest extends ClientRequest implements Cloneable {
     }
 
     Request toRequest() {
-      return new RequestTemplate()
-          .method(request.method())
-          .append(getUri().toASCIIString())
-          .headers(request.headers())
-          .body(request.body(), request.charset())
-          .request();
+      // add header "Content-Length" according to the request body
+      final byte[] body = request.body();
+      final int bodyLength = body != null ? body.length : 0;
+      // create a new Map to avoid side effect, not to change the old headers
+      Map<String, Collection<String>> headers = new LinkedHashMap<String, Collection<String>>();
+      headers.putAll(request.headers());
+      headers.put(Util.CONTENT_LENGTH, Arrays.asList(String.valueOf(bodyLength)));
+      return Request.create(request.method(), getUri().toASCIIString(), headers, body, request.charset());
     }
 
     Client client() {

ribbon/src/test/java/feign/ribbon/LBClientTest.java

@@ -0,0 +1,39 @@
+package feign.ribbon;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.nio.charset.Charset;
+import java.util.Collection;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+import org.junit.Test;
+
+import feign.Request;
+import feign.ribbon.LBClient.RibbonRequest;
+
+public class LBClientTest {
+
+  @Test
+  public void testRibbonRequest() throws URISyntaxException {
+    // test for RibbonRequest.toRequest()
+    // the url has a query whose value is an encoded json string
+    String urlWithEncodedJson = "http://test.feign.com/p?q=%7b%22a%22%3a1%7d";
+    String method = "GET";
+    URI uri = new URI(urlWithEncodedJson);
+    Map<String, Collection<String>> headers = new LinkedHashMap<String, Collection<String>>();
+    // create a Request for recreating another Request by toRequest()
+    Request requestOrigin = Request.create(method, uri.toASCIIString(), headers, null, Charset.forName("utf-8")); 
+    RibbonRequest ribbonRequest = new RibbonRequest(null, requestOrigin, uri);
+
+    // use toRequest() recreate a Request
+    Request requestRecreate = ribbonRequest.toRequest();
+
+    // test that requestOrigin and requestRecreate are same except the header 'Content-Length'
+    // ps, requestOrigin and requestRecreate won't be null
+    assertThat(requestOrigin.toString()).isEqualTo(String.format("%s %s HTTP/1.1\n", method, urlWithEncodedJson));
+    assertThat(requestRecreate.toString()).isEqualTo(String.format("%s %s HTTP/1.1\nContent-Length: 0\n", method, urlWithEncodedJson));
+  }
+}