think-trace

() () () ()
think-trace is an error handler for ThinkJS 3.x and koa2. It provides a pretty error web interface that helps you debug your web project.

Installation

npm install think-trace

How To Use

Koa2

const traceMiddleware = require('think-trace');
app.use(traceMiddleware({
  sourceMap: false,
  error: err => console.error(err)
}));

ThinkJS3.x

Modify src/config/middleware.js:

const trace = require('think-trace');

module.exports = [
  {
    handle: trace, 
    options: {
      sourceMap: false,
      error(err, ctx) {
        return console.error(err);
      }
    }
  }
];

Options

• sourceMap: Whether your project has source map support, default is true.
• debug: Whether show error detail in web, default is true.
• ctxLineNumbers: How long you want show error line context, default is 10.
• contentType: Due to think-trace can't get content-type while application throw error, you should set content type by yourself by this parameter. Default value is ctx => 'html';. You can set json content type like this:

```js
{
  contentType(ctx) {
    // All request url starts of /api or request header contains `X-Requested-With: XMLHttpRequest` will output json error
    const APIRequest = /^\/api/.test(ctx.request.path);
    const AJAXRequest = ctx.is('X-Requested-With', 'XMLHttpRequest');
    
    return APIRequest || AJAXRequest ? 'json' : 'html';
  }
}
```

• error: callback function when catch error, it receives Error object and ctx as parameter.
• templates: error status template path, if you want to specific. You can set templates as a path string, then module will read all status file named like 404.html, 502.html as your customed status page. Or you can set templates as an object, for example:

```js
{
  options: {
    //basic set as string, then put 404.html, 500.html into error folder
    templates: path.join(__dirname, 'error'),

    //customed set as object
    templates: {
      404: path.join(__dirname, 'error/404.html'),
      500: path.join(__dirname, 'error/500.html'),
      502: path.join(__dirname, 'error/502.html')
    }
  }
}
```

Also you can set templates as function, function should return error template file path or error template file path object.

Contributing

Contributions welcome!

License

MIT