$ node crawler.js

E:\Node\http\crawler.js:56

http.get(url,function(res){

^^^^

SyntaxError: Unexpected identifier

    at exports.runInThisContext (vm.js:53:16)

    at Module._compile (module.js:374:25)

    at Object.Module._extensions..js (module.js:405:10)

    at Module.load (module.js:344:32)

    at Function.Module._load (module.js:301:12)

    at Function.Module.runMain (module.js:430:10)

    at startup (node.js:141:18)

    at node.js:980:3

是哪里问题呢，一样的代码