Hexo在Github中搭建博客系统(6)异常处理

异常

这里主要收集Hexo在搭建博客的时候出现的异常以及处理方案

在进行启动服务器模拟查看时hexo s –debug出现的启动异常

(1) 无法执行now函数异常

1.1 异常内容

13:51:28.741 FATAL (unknown path) [Line 7, Column 533]  Error: Unable to call `now`, which is undefined or falseyTemplate render error: (unknown path) [Line 7, Column 533]  Error: Unable to call `now`, which is undefined or falsey    at Object.exports.prettifyError (/Users/hushuang/hexosite/node_modules/nunjucks/src/lib.js:34:15)    at /Users/hushuang/hexosite/node_modules/nunjucks/src/environment.js:485:31    at root [as rootRenderFunc] (eval at <anonymous> (/Users/hushuang/hexosite/node_modules/nunjucks/src/environment.js:564:24), <anonymous>:20:3)    at Obj.extend.render (/Users/hushuang/hexosite/node_modules/nunjucks/src/environment.js:478:15)    at Obj.extend.renderString (/Users/hushuang/hexosite/node_modules/nunjucks/src/environment.js:326:21)    at /Users/hushuang/hexosite/node_modules/hexo/lib/extend/tag.js:66:9    at Promise._execute (/Users/hushuang/hexosite/node_modules/bluebird/js/release/debuggability.js:272:9)    at Promise._resolveFromExecutor (/Users/hushuang/hexosite/node_modules/bluebird/js/release/promise.js:475:18)    at new Promise (/Users/hushuang/hexosite/node_modules/bluebird/js/release/promise.js:77:14)    at Tag.render (/Users/hushuang/hexosite/node_modules/hexo/lib/extend/tag.js:64:10)    at Object.tagFilter [as onRenderEnd] (/Users/hushuang/hexosite/node_modules/hexo/lib/hexo/post.js:253:16)    at /Users/hushuang/hexosite/node_modules/hexo/lib/hexo/render.js:65:19    at tryCatcher (/Users/hushuang/hexosite/node_modules/bluebird/js/release/util.js:16:23)    at Promise._settlePromiseFromHandler (/Users/hushuang/hexosite/node_modules/bluebird/js/release/promise.js:504:31)    at Promise._settlePromise (/Users/hushuang/hexosite/node_modules/bluebird/js/release/promise.js:561:18)    at Promise._settlePromise0 (/Users/hushuang/hexosite/node_modules/bluebird/js/release/promise.js:606:10)    at Promise._settlePromises (/Users/hushuang/hexosite/node_modules/bluebird/js/release/promise.js:685:18)    at Async._drainQueue (/Users/hushuang/hexosite/node_modules/bluebird/js/release/async.js:138:16)    at Async._drainQueues (/Users/hushuang/hexosite/node_modules/bluebird/js/release/async.js:148:10)    at Immediate.Async.drainQueues (/Users/hushuang/hexosite/node_modules/bluebird/js/release/async.js:17:14)    at runCallback (timers.js:574:20)    at tryOnImmediate (timers.js:554:5)

1.2 原因

这类异常一般是文章中使用了now( ), 小括号( )属于特殊字符,在编译文章时将now( )当函数处理了,结果找不到函数,就报错了。

1.3 解决方案

可以参考Markdown语法第(0)章-特殊字符
将now( )的小括号通过( ) 进行转换

---

(2) 意外的标记异常

2.1 异常内容

14:55:15.987 FATAL (unknown path) [Line 119, Column 62]  unexpected token: }}Template render error: (unknown path) [Line 119, Column 62]  unexpected token: }}    at Object.exports.prettifyError (/Users/hushuang/hexosite/node_modules/nunjucks/src/lib.js:34:15)    at Obj.extend.render (/Users/hushuang/hexosite/node_modules/nunjucks/src/environment.js:468:27)    at Obj.extend.renderString (/Users/hushuang/hexosite/node_modules/nunjucks/src/environment.js:326:21)    at /Users/hushuang/hexosite/node_modules/hexo/lib/extend/tag.js:66:9    at Promise._execute (/Users/hushuang/hexosite/node_modules/bluebird/js/release/debuggability.js:272:9)    at Promise._resolveFromExecutor (/Users/hushuang/hexosite/node_modules/bluebird/js/release/promise.js:475:18)    at new Promise (/Users/hushuang/hexosite/node_modules/bluebird/js/release/promise.js:77:14)    at Tag.render (/Users/hushuang/hexosite/node_modules/hexo/lib/extend/tag.js:64:10)    at Object.tagFilter [as onRenderEnd] (/Users/hushuang/hexosite/node_modules/hexo/lib/hexo/post.js:253:16)    at /Users/hushuang/hexosite/node_modules/hexo/lib/hexo/render.js:65:19    at tryCatcher (/Users/hushuang/hexosite/node_modules/bluebird/js/release/util.js:16:23)    at Promise._settlePromiseFromHandler (/Users/hushuang/hexosite/node_modules/bluebird/js/release/promise.js:504:31)    at Promise._settlePromise (/Users/hushuang/hexosite/node_modules/bluebird/js/release/promise.js:561:18)    at Promise._settlePromise0 (/Users/hushuang/hexosite/node_modules/bluebird/js/release/promise.js:606:10)    at Promise._settlePromises (/Users/hushuang/hexosite/node_modules/bluebird/js/release/promise.js:685:18)    at Async._drainQueue (/Users/hushuang/hexosite/node_modules/bluebird/js/release/async.js:138:16)    at Async._drainQueues (/Users/hushuang/hexosite/node_modules/bluebird/js/release/async.js:148:10)    at Immediate.Async.drainQueues (/Users/hushuang/hexosite/node_modules/bluebird/js/release/async.js:17:14)    at runCallback (timers.js:574:20)    at tryOnImmediate (timers.js:554:5)    at processImmediate [as _immediateCallback] (timers.js:533:5)

2.2 原因

这类异常一般是文章中使用了大括号 { } 这个特殊字符,且没有转义导致编译不通过

2.3 解决方案

可以参考Markdown语法第(0)章-特殊字符
将 { } 的大括号通过{ } 进行转换

---

(3) 模板渲染错误异常

3.1 异常内容

Template render error: parseSignature: expected comma after expression        at Error.exports.TemplateError (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/lib.js:51:19)        at Object.extend.fail (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:64:15)        at Object.extend.parseSignature (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:1077:22)        at Object.extend.parsePostfix (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:616:47)        at Object.extend.parsePrimary (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:933:29)        at Object.extend.parseUnary (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:882:25)        at Object.extend.parsePow (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:856:25)        at Object.extend.parseMod (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:844:25)        at Object.extend.parseFloorDiv (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:832:25)        at Object.extend.parseDiv (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:820:25)        at Object.extend.parseMul (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:808:25)        at Object.extend.parseSub (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:796:25)        at Object.extend.parseAdd (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:784:25)        at Object.extend.parseCompare (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:751:25)        at Object.extend.parseIn (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:720:23)        at Object.extend.parseNot (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:716:21)        at Object.extend.parseAnd (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:698:25)        at Object.extend.parseOr (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:686:25)        at Object.extend.parseInlineIf (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:668:25)        at Object.extend.parseExpression (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:663:25)        at Object.extend.parseNodes (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:1158:30)        at Object.extend.parse (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:1173:46)        at Object.extend.parseUntilBlocks (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:1111:24)        at NunjucksBlock._parseBody (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/lib/extend/tag.js:111:21)        at NunjucksBlock.parse (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/lib/extend/tag.js:105:19)        at Object.extend.parseStatement (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:540:36)        at Object.extend.parseNodes (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:1151:30)        at Object.extend.parseAsRoot (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:1177:42)        at Object.module.exports.parse (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/parser.js:1199:18)        at Object.module.exports.compile (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/compiler.js:1118:48)        at Obj.extend._compile (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/environment.js:444:35)        at Obj.extend.compile (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/environment.js:433:18)        at null.<anonymous> (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/environment.js:378:22)        at Object.exports.withPrettyErrors (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/lib.js:24:16)        at Obj.extend.render (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/environment.js:374:20)        at Obj.extend.renderString (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/nunjucks/src/environment.js:261:21)        at /media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/lib/extend/tag.js:56:9        at tryCatcher (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/bluebird/js/main/util.js:24:31)        at Promise._resolveFromResolver (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/bluebird/js/main/promise.js:427:31)        at new Promise (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/bluebird/js/main/promise.js:53:37)        at Tag.render (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/lib/extend/tag.js:55:10)        at Object.tagFilter [as onRenderEnd] (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/lib/hexo/post.js:253:16)        at Promise.then.then.then.output (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/lib/hexo/render.js:55:19)        at tryCatcher (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/bluebird/js/main/util.js:24:31)        at Promise._settlePromiseFromHandler (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/bluebird/js/main/promise.js:454:31)        at Promise._settlePromiseAt (/media/WinE/User/Documents/howiefh.github.io/node_modules/hexo/node_modules/bluebird/js/main/promise.js:530:18)

3.2 原因

这类异常一般是文章中使用了某个特殊字符, 解析时讲表达式中的内容按函数处理了,特殊字符没有转义导致编译不通过,就像下面的内容

参数 说明 repo OpenShift 库(Repository)地址 message 自定提交信息 (默认为 Site updated: { { now(’YYYY-MM-DD HH:mm:ss’) } })

3.3 解决方案

可以参考Markdown语法特殊字符处理 这章内容
将特殊字符通过转义进行转换
当然,最好的方案是避免写特殊字符

---

下一节:万网域名解析到Github Pages