diff --git a/src/js_tests/wirecloud/ioSpec.js b/src/js_tests/wirecloud/ioSpec.js
index 656a3197f6..3e4015e130 100644
--- a/src/js_tests/wirecloud/ioSpec.js
+++ b/src/js_tests/wirecloud/ioSpec.js
@@ -92,6 +92,38 @@
                 })).toBe(expected);
             });
 
+            it("should do nothing when using data urls and the forceProxy option", function () {
+                var original = "data:text/html,lots%20of%20text...<p><a%20name%3D\"bottom\">bottom</a>?arg=val";
+
+                expect(Wirecloud.io.buildProxyURL(original, {
+                    forceProxy: true
+                })).toBe(original);
+            });
+
+            it("should do nothing when using data urls and the forceProxy option (using URL instances)", function () {
+                var original = new URL("data:text/html,lots%20of%20text...<p><a%20name%3D\"bottom\">bottom</a>?arg=val");
+
+                expect(Wirecloud.io.buildProxyURL(original, {
+                    forceProxy: true
+                })).toBe(original.toString());
+            });
+
+            it("should do nothing when using blob urls and the forceProxy option", function () {
+                var original = "blob:d3958f5c-0777-0845-9dcf-2cb28783acaf";
+
+                expect(Wirecloud.io.buildProxyURL(original, {
+                    forceProxy: true
+                })).toBe(original);
+            });
+
+            it("should do nothing when using blob urls and the forceProxy option (using URL instances)", function () {
+                var original = new URL("blob:d3958f5c-0777-0845-9dcf-2cb28783acaf");
+
+                expect(Wirecloud.io.buildProxyURL(original, {
+                    forceProxy: true
+                })).toBe(original.toString());
+            });
+
             it("should support the parameters option (using URL instances)", function () {
                 var original = new URL("http://server:1234/path");
                 var expected = "https://wirecloud.example.com/cdp/http/server:1234/path?e=1&b=c";
@@ -141,6 +173,30 @@
                 })).toBe(expected);
             });
 
+            it("should ignore the parameters option when using data URL instances", function () {
+                var original = new URL("data:text/html,lots of text...<p><a name%3D\"bottom\">bottom</a>?arg=val");
+
+                expect(Wirecloud.io.buildProxyURL(original, {
+                    method: 'GET',
+                    parameters: {
+                        e: 1,
+                        b: "c"
+                    }
+                })).toBe(original.toString());
+            });
+
+            it("should ignore the parameters option when using blob URL instances", function () {
+                var original = new URL("blob:d3958f5c-0777-0845-9dcf-2cb28783acaf");
+
+                expect(Wirecloud.io.buildProxyURL(original, {
+                    method: 'GET',
+                    parameters: {
+                        e: 1,
+                        b: "c"
+                    }
+                })).toBe(original.toString());
+            });
+
         });
 
         describe("makeRequest(url, options)", function () {
diff --git a/src/wirecloud/platform/static/js/wirecloud/io.js b/src/wirecloud/platform/static/js/wirecloud/io.js
index 1da6fb876b..3650d76f95 100644
--- a/src/wirecloud/platform/static/js/wirecloud/io.js
+++ b/src/wirecloud/platform/static/js/wirecloud/io.js
@@ -232,7 +232,7 @@
     var io = {};
 
     io.buildProxyURL = function buildProxyURL(url, options) {
-        var forceProxy;
+        var forceProxy, inmemoryurl;
 
         options = utils.merge({
             method: 'POST',
@@ -243,13 +243,14 @@
             postBody: null
         }, options);
 
-        forceProxy = !!options.forceProxy;
-
         if (!(url instanceof URL)) {
             url = new URL(url, Wirecloud.location.domain + Wirecloud.URLs.ROOT_URL);
         }
 
-        if (forceProxy || (options.supportsAccessControl !== true && url.origin !== Wirecloud.location.domain)) {
+        forceProxy = !!options.forceProxy;
+        inmemoryurl = ["blob:", "data:"].indexOf(url.protocol) !== -1;
+
+        if (!inmemoryurl && (forceProxy || (options.supportsAccessControl !== true && url.origin !== Wirecloud.location.domain))) {
             url = Wirecloud.location.domain +
                 Wirecloud.URLs.PROXY.evaluate({protocol: url.protocol.slice(0, -1), domain: url.host, path: url.pathname}) + url.search;
         } else {
@@ -257,7 +258,7 @@
         }
 
         // Add parameters
-        if (options.parameters != null && (typeof options.parameters === 'string' || typeof options.parameters === 'object')) {
+        if (!inmemoryurl && options.parameters != null && (typeof options.parameters === 'string' || typeof options.parameters === 'object')) {
             if (['PUT', 'POST'].indexOf(options.method) === -1 || options.postBody != null) {
                 if (url.indexOf('?') !== -1) {
                     url += '&' + toQueryString(options.parameters);