(Last Updated On: 2018年8月13日)
CasperJSやPhantomJSを使っていてシンタックスエラーがあると
[yohgaki@localhost ]$ casperjs test.js SyntaxError: Parse error
と表示するだけでエラー行を返してくれません。
上記のエラーは以下のスクリプトで起きています。
[yohgaki@localhost]$ cat test.js
var casper = require('casper').create();
casper.start('http://casperjs.org/', function() {
this.echo(this.getTitle());
});
casper.thenOpen('http://kakaku.com', function() {
this.echo(this.getTitle();
});
casper.run();
シンタックスエラーはPhantomJSで起きているのでCasperJSでなくPhantomJSを使っても同じです。
[yohgaki@localhost ]$ phantomjs test.js SyntaxError: Parse error
デバッグオプションなどを設定しても状況は変わりません。
[yohgaki@localhost ]$ phantomjs --debug=yes test.js
2013-11-24T08:27:59 [DEBUG] CookieJar - Created but will not store cookies (use option '--cookies-file=<filename>' to enable persisten cookie storage)
2013-11-24T08:27:59 [DEBUG] Phantom - execute: Configuration
2013-11-24T08:27:59 [DEBUG] 0 objectName : ""
2013-11-24T08:27:59 [DEBUG] 1 cookiesFile : ""
2013-11-24T08:27:59 [DEBUG] 2 diskCacheEnabled : "false"
2013-11-24T08:27:59 [DEBUG] 3 maxDiskCacheSize : "-1"
2013-11-24T08:27:59 [DEBUG] 4 ignoreSslErrors : "false"
2013-11-24T08:27:59 [DEBUG] 5 localToRemoteUrlAccessEnabled : "false"
2013-11-24T08:27:59 [DEBUG] 6 outputEncoding : "UTF-8"
2013-11-24T08:27:59 [DEBUG] 7 proxyType : "http"
2013-11-24T08:27:59 [DEBUG] 8 proxy : ":1080"
2013-11-24T08:27:59 [DEBUG] 9 proxyAuth : ":"
2013-11-24T08:27:59 [DEBUG] 10 scriptEncoding : "UTF-8"
2013-11-24T08:27:59 [DEBUG] 11 webSecurityEnabled : "true"
2013-11-24T08:27:59 [DEBUG] 12 offlineStoragePath : ""
2013-11-24T08:27:59 [DEBUG] 13 offlineStorageDefaultQuota : "-1"
2013-11-24T08:27:59 [DEBUG] 14 printDebugMessages : "true"
2013-11-24T08:27:59 [DEBUG] 15 javascriptCanOpenWindows : "true"
2013-11-24T08:27:59 [DEBUG] 16 javascriptCanCloseWindows : "true"
2013-11-24T08:27:59 [DEBUG] 17 sslProtocol : "sslv3"
2013-11-24T08:27:59 [DEBUG] 18 sslCertificatesPath : ""
2013-11-24T08:27:59 [DEBUG] 19 webdriver : ":"
2013-11-24T08:27:59 [DEBUG] 20 webdriverLogFile : ""
2013-11-24T08:27:59 [DEBUG] 21 webdriverLogLevel : "INFO"
2013-11-24T08:27:59 [DEBUG] 22 webdriverSeleniumGridHub : ""
2013-11-24T08:27:59 [DEBUG] Phantom - execute: Script & Arguments
2013-11-24T08:27:59 [DEBUG] script: "test.js"
2013-11-24T08:27:59 [DEBUG] Phantom - execute: Starting normal mode
2013-11-24T08:27:59 [DEBUG] WebPage - setupFrame ""
2013-11-24T08:27:59 [DEBUG] FileSystem - _open: ":/modules/fs.js" QMap(("mode", QVariant(QString, "r") ) )
2013-11-24T08:27:59 [DEBUG] FileSystem - _open: ":/modules/system.js" QMap(("mode", QVariant(QString, "r") ) )
2013-11-24T08:27:59 [DEBUG] FileSystem - _open: ":/modules/_coffee-script.js" QMap(("mode", QVariant(QString, "r") ) )
2013-11-24T08:27:59 [DEBUG] FileSystem - _open: ":/modules/../coffee-script/package.json" QMap(("mode", QVariant(QString, "r") ) )
2013-11-24T08:27:59 [DEBUG] FileSystem - _open: ":/modules/../coffee-script/./lib/coffee-script/coffee-script.js" QMap(("mode", QVariant(QString, "r") ) )
2013-11-24T08:27:59 [DEBUG] FileSystem - _open: ":/modules/../coffee-script/./lib/coffee-script/./lexer.js" QMap(("mode", QVariant(QString, "r") ) )
2013-11-24T08:27:59 [DEBUG] FileSystem - _open: ":/modules/../coffee-script/./lib/coffee-script/././rewriter.js" QMap(("mode", QVariant(QString, "r") ) )
2013-11-24T08:27:59 [DEBUG] FileSystem - _open: ":/modules/../coffee-script/./lib/coffee-script/././helpers.js" QMap(("mode", QVariant(QString, "r") ) )
2013-11-24T08:27:59 [DEBUG] FileSystem - _open: ":/modules/../coffee-script/./lib/coffee-script/./parser.js" QMap(("mode", QVariant(QString, "r") ) )
2013-11-24T08:27:59 [DEBUG] FileSystem - _open: ":/modules/../coffee-script/./lib/coffee-script/./helpers.js" QMap(("mode", QVariant(QString, "r") ) )
2013-11-24T08:27:59 [DEBUG] FileSystem - _open: ":/modules/../coffee-script/./lib/coffee-script/./nodes.js" QMap(("mode", QVariant(QString, "r") ) )
2013-11-24T08:27:59 [DEBUG] FileSystem - _open: ":/modules/../coffee-script/./lib/coffee-script/././scope.js" QMap(("mode", QVariant(QString, "r") ) )
2013-11-24T08:27:59 [DEBUG] FileSystem - _open: ":/modules/../coffee-script/./lib/coffee-script/./././helpers.js" QMap(("mode", QVariant(QString, "r") ) )
2013-11-24T08:27:59 [DEBUG] FileSystem - _open: ":/modules/../coffee-script/./lib/coffee-script/././lexer.js" QMap(("mode", QVariant(QString, "r") ) )
2013-11-24T08:27:59 [DEBUG] FileSystem - _open: ":/modules/../coffee-script/./lib/coffee-script/./././rewriter.js" QMap(("mode", QVariant(QString, "r") ) )
2013-11-24T08:27:59 [DEBUG] FileSystem - _open: ":/modules/webpage.js" QMap(("mode", QVariant(QString, "r") ) )
SyntaxError: Parse error
シンタックスエラーは注意していても書いてしまいます。エラー行がどこなのか分からなければ効率が悪くて仕方ありません。シンタックスエラーだけならNode.jsでも見つけられるのでnodeコマンドで実行してみます。
[yohgaki@localhost ]$ node test.js
/home/yohgaki/test.js:8
this.echo(this.getTitle();
^
SyntaxError: Unexpected token ;
at Module._compile (module.js:439:25)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
at startup (node.js:119:16)
at node.js:901:3
ばっちりエラー行を取得出来ました。
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