如何在 NodeJS 的请求中对表单字段中的数组进行编码？

Question

我使用的 API 需要我在表单字段中放置一个数组。给出的示例在 PHP 中，但我使用的是 NodeJS。 API 期望其中一个字段是一个数组，我很难弄清楚如何做到这一点。

PHP 示例如下所示：

$request->buildPostBody(array(
 'reference' => array(
 'line1' => 'Soundboard Setup',
 'line2' => 'Thank you for the order',
 'line3' => 'Our reference is: 3993029/11BD'
 ),
 'lines' => array(
 array('amount' => 50,
 'amount_desc' => 'panels',
 'description' => 'Sound buttons',
 'tax_rate' => 21,
 'price' => 5.952
 ),
 array('amount' => 1,
 'amount_desc' => '',
 'description' => 'Wooden case',
 'tax_rate' => 21,
 'price' => 249
 ),
 array('amount' => 10,
 'amount_desc' => 'hours',
 'description' => 'Support',
 'tax_rate' => 6,
 'price' => 62.5
 ),
 array('description' => 'This is a textline'))
));

在 NodeJS 中，我试过这个（除其他外）：

var formData = {
  reference: [{'line1':'something'}], // <- this isn't going to fly
  lines: [{
    'amount': amount,
    'amount_desc': 'amount_desc',
    'description': 'description',
    'tax_rate': 0,
    'price': 100
  }]
};

request.post({
    url: 'https://www.factuursturen.nl/api/v1/invoices/',
    formData: formData,
    headers: {
      'Authorization': 'Basic ' + new Buffer(user + ':' + key).toString('base64')
    }
  }, function (error, response, body) {
    if (!error && [200, 201, 204].indexOf(response.statusCode) > 0) {
      console.log('posted ': ', response.statusCode);
    } else {
      console.log('problem with request: ', error, response.statusCode, body);
    }
  }
);

当我尝试像这样传递对象时：reference: {'line1':'foo'} 我从 Node 收到错误：

node_modules/request/node_modules/combined-stream/node_modules/delayed-stream/lib/delayed_stream.js:33
  source.on('error', function() {});
         ^
TypeError: Object #<Object> has no method 'on'

我怎样才能最好地把这个圆钉钉进那个方孔？

Answer 1

在PHP中数组可以是数组和它们可以是关联数组，它们本质上是 JavaScript.

中的对象

Specifying with array()

An array can be created using the array() language construct. It takes any number of comma-separated key => value pairs as arguments.
array(
    key  => value,
    key2 => value2,
    key3 => value3,
    ...
)

在JavaScript中，上面的内容本质上是只是一个对象

{
    key: 'value',
    key2: 'value2'
    key3: 'value3'
    ...
}

它不会是包裹在数组 [{…}] 中的对象，这正是您对 reference

所做的

因此，要模仿 PHP 结构，您的数据应如下所示：

var formData = {
  reference: {'line1':'something'}, // <- this should work now
  lines: [{  // <- this is still an array of objects [{}], as in PHP too, it's a nested array
    amount: amount,
    'amount_desc': 'amount_desc',
    'description': 'description',
    'tax_rate': 0,
    'price': 100
  }]
};

但是正如您所注意到的，这会导致另一个问题。

When I try to pass an object like so: reference: {'line1':'foo'} I get an error from Node:
node_modules/request/node_modules/combined-stream/node_modules/delayed-stream/lib/delayed_stream.js:33
  source.on('error', function() {});
         ^
TypeError: Object #<Object> has no method 'on'

这里解释这个错误：https://github.com/request/request/issues/1495 基本上 form-data 只需要简单的对象，可能只有 1 层深。

试试这个：

var formData = {
  'reference.line1': 'something',
  'lines[0].amount': amount,
  'lines[0].amount_desc': 'amount_desc',
  'lines[0].description': 'description',
  'lines[0].tax_rate': 0,
  'lines[0].price': 100,
};

如何在 NodeJS 的请求中对表单字段中的数组进行编码？

How do I encode an array in a form field in NodeJS' request?

php

arrays

form-data

node.js

node-request

Specifying with array()