Dojo/io-query Source Code Analysis

The module mainly handles the query part of the URL, and when we send a GET request, the parameters are placed directly in the URL, and often the requirement is to convert an object into a query string and put it into the URL to send a GET request. The Io-query module provides two ways to handle query:

• Objecttoquery converts an object into a query string
• Querytoobject Convert query string to object

Converting from an object to query is the process of stitching, and the fields and values of an object need to be coded

Objecttoquery:functionObjecttoquery (/*Object*/map) {        //Summary:        //takes a Name/value mapping object and returns a String representing        //a url-encoded version of that object.        //Example:        //This object:        //        //    | {        //    | Blah: "Blah",        //    | Multi: [        //    | "Thud",        //    | "Thonk"        //    | ]        //    | };        //        //yields the following query string:        //        //    | "Blah=blah&multi=thud&multi=thonk"        varENC = encodeuricomponent, pairs = [];  for(varNameinchmap) {            varValue =Map[name]; //backstop is an empty object that is designed to prevent fields such as the ToString inherited from being processed            if(Value! =Backstop[name]) {                varassign = ENC (name) + "="; if(Lang.isarray (value)) {//arrays are encoded into each array of elements: Multi=thud&multi=thonk                     for(vari = 0, L = value.length; I < L; ++i) {Pairs.push (Assign+enc (value[i])); }                }Else{Pairs.push (assign+Enc (value)); }            }        }        returnPairs.join ("&");//String}

　　

Query to object is the process of string splitting, both parameters and parameter values need to be decoded using decodeuricomponent

Querytoobject:functionQuerytoobject (/*String*/str) {        //Summary:        //Create An object representing a de-serialized query section of a        //URL. Query keys with multiple values is returned in an array.        //        //Example:        //This string:        //        //    | "foo=bar&foo=baz&thinger=%20spaces%20=blah&zonk=blarg&"        //        //results in this object structure:        //        //    | {        //    | Foo: ["Bar", "Baz"],        //    | Thinger: "Spaces =blah",        //    | Zonk: "Blarg"        //    | }        //        //Note that spaces and other urlencoded entities is correctly        //handled.                //String Segmentation        varDec = decodeuricomponent, QP = Str.split ("&"), ret ={}, name, Val;  for(vari = 0, L = qp.length, item; I < L; ++i) {Item=Qp[i]; if(item.length) {vars = item.indexof ("="); if(S < 0) {//Null valueName =Dec (item); Val= ""; }Else{                    //split "A=b" in the form of name A,val bname = Dec (Item.slice (0, s)); Val= Dec (Item.slice (s + 1)); }                //a name that corresponds to more than one value is converted to an array                if(typeofRet[name] = = "string") {//inline ' d type checkRet[name] =[Ret[name]]; }                if(Lang.isarray (Ret[name])) {Ret[name].push (val); }Else{Ret[name]=Val; }            }        }        returnRet//Object}

Dojo/io-query Source Code Analysis