think-payload


Payload for Thinkjs 3.0

Install

``
$ npm install think-payload --save
`

Usage


config file src/config/middleware.js

`javascript
const payload = require('think-payload');

module.exports = [{
handle: payload,
options: {}
}]
`

$3

`javascript
this.ctx.body = this.ctx.request.body

// use rawBody to get raw request body
this.ctc.request.rawBody
`

#### this.ctx.request.body

- post: the parsed body will store in post, if nothing was parsed, body will be an empty object {}
- file: the parsed file will store in file
- [key-name]
- size: file size
- path: file path
- name: file name
- type: file type
- mtime: File upload time

$3

- limit: The byte limit of the body.
This is the number of bytes or any string format supported by
bytes,
for example 1000, '500kb' or '3mb'.
If the body ends up being larger than this limit,
a 413 error code is returned.
- encoding: The encoding to use to decode the body into a string.
By default, a Buffer instance will be returned when no encoding is specified.
Most likely, you want utf-8, so setting encoding to true will decode as utf-8.
You can use any type of encoding supported by iconv-lite. If it is a file upload, the default is utf-8, Because file uploads are based on node-formidable.
- extendTypes: support extend types:

`javascript
const payload = require('think-payload');

module.exports = [{
handle: payload,
options: {
extendTypes: {
json: ['application/x-javascript'], // will parse application/x-javascript type body in the same way as JSON type
form: ['application/thinkjs-form'], // will parse application/thinkjs-form type body in the same way as form type
text: ['application/thinkjs-text'], // will parse application/thinkjs-text type body in the same way as text type
multipart: ['application/thinkjs-multipart'], // will parse application/thinkjs-multipart type body in the same way as multipart-form type
xml: ['application/thinkjs-xml'], // will parse application/thinkjs-xml type body in the same way as xml type
}
}
}]
`

The following options are parsing form data, especially file uploads.

- uploadDir: Sets the directory for placing file uploads in. You can move them later on using fs.rename(). The default is os.tmpdir().
- keepExtensions: If you want the files written to form.uploadDir to include the extensions of the original files, set this property to true.
- maxFieldsSize: Limits the amount of memory all fields together (except files) can allocate in bytes. If this value is exceeded, an 'error' event is emitted. The default size is 20MB.
- maxFileSize: Limits the size of uploaded file. If this value is exceeded, an 'error' event is emitted. The default size is 200MB.
- maxFields: Limits the number of fields that the querystring parser will decode. Defaults to 1000 (0 for unlimited).
- hash: If you want checksums calculated for incoming files, set this to either 'sha1' or 'md5'.
- multiples If this option is enabled, when you call form.parse, the files argument will contain arrays of files for inputs which submit multiple files using the HTML5 multiple attribute.
- See more node-formidable

$3

This module creates errors depending on the error condition during reading. The error may be an error from the underlying Node.js implementation, but is otherwise an error created by this module, which has the following attributes:

- limit - the limit in bytes
- length and expected - the expected length of the stream
- message error message
- received - the received bytes
- encoding - the invalid encoding
- status and statusCode - the corresponding status code for the error
- type` - the error type

#### Types
The errors from this module have a type property which allows for the progamatic determination of the type of error returned.

encoding.unsupported

This error will occur when the encoding option is specified, but the value does not map to an encoding supported by the iconv-lite module.

entity.too.large

This error will occur when the limit option is specified, but the stream has an entity that is larger.

request.aborted

This error will occur when the request stream is aborted by the client before reading the body has finished.

request.size.invalid

This error will occur when the length option is specified, but the stream has emitted more bytes.

stream.encoding.set

This error will occur when the given stream has an encoding set on it, making it a decoded stream. The stream should not have an encoding set and is expected to emit Buffer objects.