fix($http): config.param should expand array values properly

Today, calling e.g. $http(url, { params: { a: [1,2,3] } }) results in a query
string like "?a=%5B1%2C2%2C3%5D" which is undesirable. This commit enhances
buildURL to createa query string like "?a=1&a=2&a=3".

BREAKING CHANGE: if the server relied on the buggy behavior then either the
backend should be fixed or a simple serialization of the array should be done
on the client before calling the $http service.

Closes #1363

1 files changed, 9 insertions, 4 deletions

diff --git a/src/ng/http.js b/src/ng/http.js
index aa0eca74..9b133476 100644
--- a/src/ng/http.js
+++ b/src/ng/http.js
@@ -758,10 +758,15 @@ function $HttpProvider() {
           var parts = [];
           forEachSorted(params, function(value, key) {
             if (value == null || value == undefined) return;
-            if (isObject(value)) {
-              value = toJson(value);
-            }
-            parts.push(encodeURIComponent(key) + '=' + encodeURIComponent(value));
+            if (!isArray(value)) value = [value];
+
+            forEach(value, function(v) {
+              if (isObject(v)) {
+                v = toJson(v);
+              }
+              parts.push(encodeURIComponent(key) + '=' +
+                         encodeURIComponent(v));
+            });
           });
           return url + ((url.indexOf('?') == -1) ? '?' : '&') + parts.join('&');
         }