refactor(global): service separation #552

app/rest/response/handlers.js

@@ -0,0 +1,68 @@
+function isJSONArray(jsonString) {
+    return Object.prototype.toString.call(jsonString) === '[object Array]';
+}
+
+function isJSON(jsonString) {
+  try {
+    var o = JSON.parse(jsonString);
+    if (o && typeof o === "object") {
+        return o;
+    }
+  }
+  catch (e) { }
+  return false;
+}
+
+// The Docker API often returns a list of JSON object.
+// This handler wrap the JSON objects in an array.
+// Used by the API in: Image push, Image create, Events query.
+function jsonObjectsToArrayHandler(data) {
+  var str = "[" + data.replace(/\n/g, " ").replace(/\}\s*\{/g, "}, {") + "]";
+  return angular.fromJson(str);
+}
+
+// The Docker API often returns an empty string or a valid JSON object on success (Docker 1.9 -> Docker 1.12).
+// On error, it returns either an error message as a string (Docker < 1.12) or a JSON object with the field message
+// container the error (Docker = 1.12)
+// This handler ensure a valid JSON object is returned in any case.
+// Used by the API in: container deletion, network deletion, network creation, volume creation,
+// container exec, exec resize.
+function genericHandler(data) {
+  var response = {};
+  // No data is returned when deletion is successful (Docker 1.9 -> 1.12)
+  if (!data) {
+    return response;
+  }
+  // A string is returned on failure (Docker < 1.12)
+  else if (!isJSON(data)) {
+    response.message = data;
+  }
+  // Docker 1.12 returns a valid JSON object when an error occurs
+  else {
+    response = angular.fromJson(data);
+  }
+  return response;
+}
+
+// Image delete API returns an array on success (Docker 1.9 -> Docker 1.12).
+// On error, it returns either an error message as a string (Docker < 1.12) or a JSON object with the field message
+// container the error (Docker = 1.12).
+// This handler returns the original array on success or a newly created array containing
+// only one JSON object with the field message filled with the error message on failure.
+function deleteImageHandler(data) {
+  // A string is returned on failure (Docker < 1.12)
+  var response = [];
+  if (!isJSON(data)) {
+    response.push({message: data});
+  }
+  // A JSON object is returned on failure (Docker = 1.12)
+  else if (!isJSONArray(data)) {
+    var json = angular.fromJson(data);
+    response.push(json);
+  }
+  // An array is returned on success (Docker 1.9 -> 1.12)
+  else {
+    response = angular.fromJson(data);
+  }
+  return response;
+}