requirebin sketch

index.js

var sync = require("ampersand-sync");
var xhr = require("xhr");

var options = {
  url: 'http://jsonplaceholder.typicode.com/posts',//a test endpoint
  headers: {
    "Content-Type": "application/json"
  },
  json: {
    foo: "bar"
  },
  method: "POST"
};

var request = sync("create", null, options);
var request2 = xhr(options, function() {});

console.log(request.headers);//note the duplicate "Content-Type" headers (different cases)
//looking in the network tab, the request headers show the content-type as "application/json, application/json".

console.log(request2.headers);
//here, the headers are normalized
//looking in the network tab, the request headers show the content-type as "application/json; charset=utf-8"

minified.js

require=function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s}({1:[function(require,module,exports){if(typeof window!=="undefined"){window.ampersand=window.ampersand||{};window.ampersand["ampersand-sync"]=window.ampersand["ampersand-sync"]||[];window.ampersand["ampersand-sync"].push("4.0.0")}var result=require("lodash.result");var defaults=require("lodash.defaults");var includes=require("lodash.includes");var assign=require("lodash.assign");var qs=require("qs");module.exports=function(xhr){var urlError=function(){throw new Error('A "url" property or function must be specified')};var methodMap={create:"POST",update:"PUT",patch:"PATCH","delete":"DELETE",read:"GET"};return function(method,model,optionsInput){var options=assign({},optionsInput);var type=methodMap[method];var headers={};defaults(options||(options={}),{emulateHTTP:false,emulateJSON:false,xhrImplementation:xhr});var params={type:type};var ajaxConfig=result(model,"ajaxConfig")||{};var key;if(ajaxConfig.headers){for(key in ajaxConfig.headers){headers[key.toLowerCase()]=ajaxConfig.headers[key]}}if(options.headers){for(key in options.headers){headers[key.toLowerCase()]=options.headers[key]}delete options.headers}assign(params,ajaxConfig);params.headers=headers;if(!options.url){options.url=result(model,"url")||urlError()}if(options.data==null&&model&&(method==="create"||method==="update"||method==="patch")){params.json=options.attrs||model.toJSON(options)}if(options.data&&type==="GET"){options.url+=includes(options.url,"?")?"&":"?";options.url+=qs.stringify(options.data);delete options.data}if(options.emulateJSON){params.headers["content-type"]="application/x-www-form-urlencoded";params.body=params.json?{model:params.json}:{};delete params.json}if(options.emulateHTTP&&(type==="PUT"||type==="DELETE"||type==="PATCH")){params.type="POST";if(options.emulateJSON)params.body._method=type;params.headers["x-http-method-override"]=type}if(options.emulateJSON){params.body=qs.stringify(params.body)}if(ajaxConfig.xhrFields){var beforeSend=ajaxConfig.beforeSend;params.beforeSend=function(req){assign(req,ajaxConfig.xhrFields);if(beforeSend)return beforeSend.apply(this,arguments)};params.xhrFields=ajaxConfig.xhrFields}params.method=params.type;var ajaxSettings=assign(params,options);var request=options.xhr=options.xhrImplementation(ajaxSettings,function(err,resp,body){if(err||resp.statusCode>=400){if(options.error){try{body=JSON.parse(body)}catch(e){}var message=err?err.message:body||"HTTP"+resp.statusCode;options.error(resp,"error",message)}}else{if(typeof 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options.allowPrototypes==="boolean"?options.allowPrototypes:internals.allowPrototypes;options.parameterLimit=typeof options.parameterLimit==="number"?options.parameterLimit:internals.parameterLimit;options.strictNullHandling=typeof options.strictNullHandling==="boolean"?options.strictNullHandling:internals.strictNullHandling;if(str===""||str===null||typeof str==="undefined"){return options.plainObjects?Object.create(null):{}}var tempObj=typeof str==="string"?internals.parseValues(str,options):str;var obj=options.plainObjects?Object.create(null):{};var keys=Object.keys(tempObj);for(var i=0,il=keys.length;i<il;++i){var key=keys[i];var newObj=internals.parseKeys(key,tempObj[key],options);obj=Utils.merge(obj,newObj,options)}return Utils.compact(obj)}},{"./utils":33}],32:[function(require,module,exports){var Utils=require("./utils");var internals={delimiter:"&",arrayPrefixGenerators:{brackets:function(prefix,key){return prefix+"[]"},indices:function(prefix,key){return prefix+"["+key+"]"},repeat:function(prefix,key){return prefix}},strictNullHandling:false};internals.stringify=function(obj,prefix,generateArrayPrefix,strictNullHandling,filter){if(typeof filter==="function"){obj=filter(prefix,obj)}else if(Utils.isBuffer(obj)){obj=obj.toString()}else if(obj instanceof Date){obj=obj.toISOString()}else if(obj===null){if(strictNullHandling){return Utils.encode(prefix)}obj=""}if(typeof obj==="string"||typeof obj==="number"||typeof obj==="boolean"){return[Utils.encode(prefix)+"="+Utils.encode(obj)]}var values=[];if(typeof obj==="undefined"){return values}var objKeys=Array.isArray(filter)?filter:Object.keys(obj);for(var i=0,il=objKeys.length;i<il;++i){var key=objKeys[i];if(Array.isArray(obj)){values=values.concat(internals.stringify(obj[key],generateArrayPrefix(prefix,key),generateArrayPrefix,strictNullHandling,filter))}else{values=values.concat(internals.stringify(obj[key],prefix+"["+key+"]",generateArrayPrefix,strictNullHandling,filter))}}return values};module.exports=function(obj,options){options=options||{};var delimiter=typeof options.delimiter==="undefined"?internals.delimiter:options.delimiter;var strictNullHandling=typeof options.strictNullHandling==="boolean"?options.strictNullHandling:internals.strictNullHandling;var objKeys;var filter;if(typeof options.filter==="function"){filter=options.filter;obj=filter("",obj)}else if(Array.isArray(options.filter)){objKeys=filter=options.filter}var keys=[];if(typeof obj!=="object"||obj===null){return""}var arrayFormat;if(options.arrayFormat in internals.arrayPrefixGenerators){arrayFormat=options.arrayFormat}else if("indices"in options){arrayFormat=options.indices?"indices":"repeat"}else{arrayFormat="indices"}var generateArrayPrefix=internals.arrayPrefixGenerators[arrayFormat];if(!objKeys){objKeys=Object.keys(obj)}for(var i=0,il=objKeys.length;i<il;++i){var key=objKeys[i];keys=keys.concat(internals.stringify(obj[key],key,generateArrayPrefix,strictNullHandling,filter))}return keys.join(delimiter)}},{"./utils":33}],33:[function(require,module,exports){var internals={};internals.hexTable=new Array(256);for(var h=0;h<256;++h){internals.hexTable[h]="%"+((h<16?"0":"")+h.toString(16)).toUpperCase()}exports.arrayToObject=function(source,options){var obj=options.plainObjects?Object.create(null):{};for(var i=0,il=source.length;i<il;++i){if(typeof source[i]!=="undefined"){obj[i]=source[i]}}return obj};exports.merge=function(target,source,options){if(!source){return target}if(typeof source!=="object"){if(Array.isArray(target)){target.push(source)}else if(typeof target==="object"){target[source]=true}else{target=[target,source]}return target}if(typeof target!=="object"){target=[target].concat(source);return target}if(Array.isArray(target)&&!Array.isArray(source)){target=exports.arrayToObject(target,options)}var keys=Object.keys(source);for(var k=0,kl=keys.length;k<kl;++k){var key=keys[k];var value=source[key];if(!Object.prototype.hasOwnProperty.call(target,key)){target[key]=value}else{target[key]=exports.merge(target[key],value,options)}}return target};exports.decode=function(str){try{return decodeURIComponent(str.replace(/\+/g," "))}catch(e){return str}};exports.encode=function(str){if(str.length===0){return str}if(typeof str!=="string"){str=""+str}var out="";for(var i=0,il=str.length;i<il;++i){var c=str.charCodeAt(i);if(c===45||c===46||c===95||c===126||c>=48&&c<=57||c>=65&&c<=90||c>=97&&c<=122){out+=str[i];continue}if(c<128){out+=internals.hexTable[c];continue}if(c<2048){out+=internals.hexTable[192|c>>6]+internals.hexTable[128|c&63];continue}if(c<55296||c>=57344){out+=internals.hexTable[224|c>>12]+internals.hexTable[128|c>>6&63]+internals.hexTable[128|c&63];continue}++i;c=65536+((c&1023)<<10|str.charCodeAt(i)&1023);out+=internals.hexTable[240|c>>18]+internals.hexTable[128|c>>12&63]+internals.hexTable[128|c>>6&63]+internals.hexTable[128|c&63]}return out};exports.compact=function(obj,refs){if(typeof obj!=="object"||obj===null){return obj}refs=refs||[];var lookup=refs.indexOf(obj);if(lookup!==-1){return refs[lookup]}refs.push(obj);if(Array.isArray(obj)){var compacted=[];for(var i=0,il=obj.length;i<il;++i){if(typeof obj[i]!=="undefined"){compacted.push(obj[i])}}return compacted}var keys=Object.keys(obj);for(i=0,il=keys.length;i<il;++i){var key=keys[i];obj[key]=exports.compact(obj[key],refs)}return obj};exports.isRegExp=function(obj){return Object.prototype.toString.call(obj)==="[object RegExp]"};exports.isBuffer=function(obj){if(obj===null||typeof obj==="undefined"){return false}return!!(obj.constructor&&obj.constructor.isBuffer&&obj.constructor.isBuffer(obj))}},{}],34:[function(require,module,exports){"use strict";var window=require("global/window");var once=require("once");var parseHeaders=require("parse-headers");module.exports=createXHR;createXHR.XMLHttpRequest=window.XMLHttpRequest||noop;createXHR.XDomainRequest="withCredentials"in new createXHR.XMLHttpRequest?createXHR.XMLHttpRequest:window.XDomainRequest;function isEmpty(obj){for(var i in obj){if(obj.hasOwnProperty(i))return false}return true}function createXHR(options,callback){function readystatechange(){if(xhr.readyState===4){loadFunc()}}function getBody(){var body=undefined;if(xhr.response){body=xhr.response}else if(xhr.responseType==="text"||!xhr.responseType){body=xhr.responseText||xhr.responseXML}if(isJson){try{body=JSON.parse(body)}catch(e){}}return body}var failureResponse={body:undefined,headers:{},statusCode:0,method:method,url:uri,rawRequest:xhr};function errorFunc(evt){clearTimeout(timeoutTimer);if(!(evt instanceof Error)){evt=new Error(""+(evt||"unknown"))}evt.statusCode=0;callback(evt,failureResponse)}function loadFunc(){if(aborted)return;var status;clearTimeout(timeoutTimer);if(options.useXDR&&xhr.status===undefined){status=200}else{status=xhr.status===1223?204:xhr.status}var response=failureResponse;var err=null;if(status!==0){response={body:getBody(),statusCode:status,method:method,headers:{},url:uri,rawRequest:xhr};if(xhr.getAllResponseHeaders){response.headers=parseHeaders(xhr.getAllResponseHeaders())}}else{err=new Error("Internal XMLHttpRequest Error")}callback(err,response,response.body)}if(typeof options==="string"){options={uri:options}}options=options||{};if(typeof callback==="undefined"){throw new Error("callback argument missing")}callback=once(callback);var xhr=options.xhr||null;if(!xhr){if(options.cors||options.useXDR){xhr=new createXHR.XDomainRequest}else{xhr=new createXHR.XMLHttpRequest}}var key;var aborted;var uri=xhr.url=options.uri||options.url;var method=xhr.method=options.method||"GET";var body=options.body||options.data;var headers=xhr.headers=options.headers||{};var sync=!!options.sync;var isJson=false;var timeoutTimer;if("json"in options){isJson=true;headers["accept"]||headers["Accept"]||(headers["Accept"]="application/json");if(method!=="GET"&&method!=="HEAD"){headers["Content-Type"]="application/json";body=JSON.stringify(options.json)}}xhr.onreadystatechange=readystatechange;xhr.onload=loadFunc;xhr.onerror=errorFunc;xhr.onprogress=function(){};xhr.ontimeout=errorFunc;xhr.open(method,uri,!sync,options.username,options.password);if(!sync){xhr.withCredentials=!!options.withCredentials}if(!sync&&options.timeout>0){timeoutTimer=setTimeout(function(){aborted=true;xhr.abort("timeout");errorFunc()},options.timeout)}if(xhr.setRequestHeader){for(key in headers){if(headers.hasOwnProperty(key)){xhr.setRequestHeader(key,headers[key])}}}else if(options.headers&&!isEmpty(options.headers)){throw new Error("Headers cannot be set on an XDomainRequest object")}if("responseType"in options){xhr.responseType=options.responseType}if("beforeSend"in options&&typeof options.beforeSend==="function"){options.beforeSend(xhr)}xhr.send(body);return xhr}function noop(){}},{"global/window":35,once:36,"parse-headers":40}],35:[function(require,module,exports){(function(global){if(typeof window!=="undefined"){module.exports=window}else if(typeof global!=="undefined"){
module.exports=global}else if(typeof self!=="undefined"){module.exports=self}else{module.exports={}}}).call(this,typeof global!=="undefined"?global:typeof self!=="undefined"?self:typeof window!=="undefined"?window:{})},{}],36:[function(require,module,exports){module.exports=once;once.proto=once(function(){Object.defineProperty(Function.prototype,"once",{value:function(){return once(this)},configurable:true})});function once(fn){var called=false;return function(){if(called)return;called=true;return fn.apply(this,arguments)}}},{}],37:[function(require,module,exports){var isFunction=require("is-function");module.exports=forEach;var toString=Object.prototype.toString;var hasOwnProperty=Object.prototype.hasOwnProperty;function forEach(list,iterator,context){if(!isFunction(iterator)){throw new TypeError("iterator must be a function")}if(arguments.length<3){context=this}if(toString.call(list)==="[object Array]")forEachArray(list,iterator,context);else if(typeof list==="string")forEachString(list,iterator,context);else forEachObject(list,iterator,context)}function forEachArray(array,iterator,context){for(var i=0,len=array.length;i<len;i++){if(hasOwnProperty.call(array,i)){iterator.call(context,array[i],i,array)}}}function forEachString(string,iterator,context){for(var i=0,len=string.length;i<len;i++){iterator.call(context,string.charAt(i),i,string)}}function forEachObject(object,iterator,context){for(var k in object){if(hasOwnProperty.call(object,k)){iterator.call(context,object[k],k,object)}}}},{"is-function":38}],38:[function(require,module,exports){module.exports=isFunction;var toString=Object.prototype.toString;function isFunction(fn){var string=toString.call(fn);return string==="[object Function]"||typeof fn==="function"&&string!=="[object RegExp]"||typeof window!=="undefined"&&(fn===window.setTimeout||fn===window.alert||fn===window.confirm||fn===window.prompt)}},{}],39:[function(require,module,exports){exports=module.exports=trim;function trim(str){return str.replace(/^\s*|\s*$/g,"")}exports.left=function(str){return str.replace(/^\s*/,"")};exports.right=function(str){return str.replace(/\s*$/,"")}},{}],40:[function(require,module,exports){var trim=require("trim"),forEach=require("for-each"),isArray=function(arg){return Object.prototype.toString.call(arg)==="[object Array]"};module.exports=function(headers){if(!headers)return{};var result={};forEach(trim(headers).split("\n"),function(row){var index=row.indexOf(":"),key=trim(row.slice(0,index)).toLowerCase(),value=trim(row.slice(index+1));if(typeof result[key]==="undefined"){result[key]=value}else if(isArray(result[key])){result[key].push(value)}else{result[key]=[result[key],value]}});return result}},{"for-each":37,trim:39}],"ampersand-sync":[function(require,module,exports){var xhr=require("xhr");module.exports=require("./core")(xhr)},{"./core":1,xhr:34}]},{},[]);require=function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s}({1:[function(require,module,exports){(function(global){if(typeof window!=="undefined"){module.exports=window}else if(typeof global!=="undefined"){module.exports=global}else if(typeof self!=="undefined"){module.exports=self}else{module.exports={}}}).call(this,typeof global!=="undefined"?global:typeof self!=="undefined"?self:typeof window!=="undefined"?window:{})},{}],2:[function(require,module,exports){module.exports=once;once.proto=once(function(){Object.defineProperty(Function.prototype,"once",{value:function(){return once(this)},configurable:true})});function once(fn){var called=false;return function(){if(called)return;called=true;return fn.apply(this,arguments)}}},{}],3:[function(require,module,exports){var isFunction=require("is-function");module.exports=forEach;var toString=Object.prototype.toString;var hasOwnProperty=Object.prototype.hasOwnProperty;function forEach(list,iterator,context){if(!isFunction(iterator)){throw new TypeError("iterator must be a function")}if(arguments.length<3){context=this}if(toString.call(list)==="[object Array]")forEachArray(list,iterator,context);else if(typeof list==="string")forEachString(list,iterator,context);else forEachObject(list,iterator,context)}function forEachArray(array,iterator,context){for(var i=0,len=array.length;i<len;i++){if(hasOwnProperty.call(array,i)){iterator.call(context,array[i],i,array)}}}function forEachString(string,iterator,context){for(var i=0,len=string.length;i<len;i++){iterator.call(context,string.charAt(i),i,string)}}function forEachObject(object,iterator,context){for(var k in object){if(hasOwnProperty.call(object,k)){iterator.call(context,object[k],k,object)}}}},{"is-function":4}],4:[function(require,module,exports){module.exports=isFunction;var toString=Object.prototype.toString;function isFunction(fn){var string=toString.call(fn);return string==="[object Function]"||typeof fn==="function"&&string!=="[object RegExp]"||typeof window!=="undefined"&&(fn===window.setTimeout||fn===window.alert||fn===window.confirm||fn===window.prompt)}},{}],5:[function(require,module,exports){exports=module.exports=trim;function trim(str){return str.replace(/^\s*|\s*$/g,"")}exports.left=function(str){return str.replace(/^\s*/,"")};exports.right=function(str){return str.replace(/\s*$/,"")}},{}],6:[function(require,module,exports){var trim=require("trim"),forEach=require("for-each"),isArray=function(arg){return Object.prototype.toString.call(arg)==="[object Array]"};module.exports=function(headers){if(!headers)return{};var result={};forEach(trim(headers).split("\n"),function(row){var index=row.indexOf(":"),key=trim(row.slice(0,index)).toLowerCase(),value=trim(row.slice(index+1));if(typeof result[key]==="undefined"){result[key]=value}else if(isArray(result[key])){result[key].push(value)}else{result[key]=[result[key],value]}});return result}},{"for-each":3,trim:5}],xhr:[function(require,module,exports){"use strict";var window=require("global/window");var once=require("once");var parseHeaders=require("parse-headers");module.exports=createXHR;createXHR.XMLHttpRequest=window.XMLHttpRequest||noop;createXHR.XDomainRequest="withCredentials"in new createXHR.XMLHttpRequest?createXHR.XMLHttpRequest:window.XDomainRequest;function isEmpty(obj){for(var i in obj){if(obj.hasOwnProperty(i))return false}return true}function createXHR(options,callback){function readystatechange(){if(xhr.readyState===4){loadFunc()}}function getBody(){var body=undefined;if(xhr.response){body=xhr.response}else if(xhr.responseType==="text"||!xhr.responseType){body=xhr.responseText||xhr.responseXML}if(isJson){try{body=JSON.parse(body)}catch(e){}}return body}var failureResponse={body:undefined,headers:{},statusCode:0,method:method,url:uri,rawRequest:xhr};function errorFunc(evt){clearTimeout(timeoutTimer);if(!(evt instanceof Error)){evt=new Error(""+(evt||"unknown"))}evt.statusCode=0;callback(evt,failureResponse)}function loadFunc(){if(aborted)return;var status;clearTimeout(timeoutTimer);if(options.useXDR&&xhr.status===undefined){status=200}else{status=xhr.status===1223?204:xhr.status}var response=failureResponse;var err=null;if(status!==0){response={body:getBody(),statusCode:status,method:method,headers:{},url:uri,rawRequest:xhr};if(xhr.getAllResponseHeaders){response.headers=parseHeaders(xhr.getAllResponseHeaders())}}else{err=new Error("Internal XMLHttpRequest Error")}callback(err,response,response.body)}if(typeof options==="string"){options={uri:options}}options=options||{};if(typeof callback==="undefined"){throw new Error("callback argument missing")}callback=once(callback);var xhr=options.xhr||null;if(!xhr){if(options.cors||options.useXDR){xhr=new createXHR.XDomainRequest}else{xhr=new createXHR.XMLHttpRequest}}var key;var aborted;var uri=xhr.url=options.uri||options.url;var method=xhr.method=options.method||"GET";var body=options.body||options.data;var headers=xhr.headers=options.headers||{};var sync=!!options.sync;var isJson=false;var timeoutTimer;if("json"in options){isJson=true;headers["accept"]||headers["Accept"]||(headers["Accept"]="application/json");if(method!=="GET"&&method!=="HEAD"){headers["Content-Type"]="application/json";body=JSON.stringify(options.json)}}xhr.onreadystatechange=readystatechange;xhr.onload=loadFunc;xhr.onerror=errorFunc;xhr.onprogress=function(){};xhr.ontimeout=errorFunc;xhr.open(method,uri,!sync,options.username,options.password);if(!sync){xhr.withCredentials=!!options.withCredentials}if(!sync&&options.timeout>0){timeoutTimer=setTimeout(function(){aborted=true;xhr.abort("timeout");errorFunc()},options.timeout)}if(xhr.setRequestHeader){for(key in headers){if(headers.hasOwnProperty(key)){xhr.setRequestHeader(key,headers[key])}}}else if(options.headers&&!isEmpty(options.headers)){throw new Error("Headers cannot be set on an XDomainRequest object")}if("responseType"in options){xhr.responseType=options.responseType}if("beforeSend"in options&&typeof options.beforeSend==="function"){options.beforeSend(xhr)}xhr.send(body);return xhr}function noop(){}},{"global/window":1,once:2,"parse-headers":6}]},{},[]);var sync=require("ampersand-sync");var xhr=require("xhr");var options={url:"http://jsonplaceholder.typicode.com/posts",headers:{"Content-Type":"application/json"},json:{foo:"bar"},method:"POST"};var request=sync("create",null,options);var request2=xhr(options,function(){});console.log(request.headers);console.log(request2.headers);

package.json

{
  "name": "requirebin-sketch",
  "version": "1.0.0",
  "dependencies": {
    "ampersand-sync": "4.0.0",
    "xhr": "2.0.3"
  }
}

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