从节点向Foxx服务（ArangoDB）发送HTTP Post请求 [英] Sending HTTP Post request from node to Foxx service (ArangoDB)
问题描述
我正在尝试从节点+快递服务器向Arangodb上的Foxx服务发送帖子请求。
I am trying to send a post request from a node + express server to my Foxx service on Arangodb.
在节点端：
var route = arangopi + '/edge/' + col.name ;
var body = {data: data, from: fromId, to: toId} ;
console.log('|| body :', route, body) ;
>> || body : http//XXX/_db/my-DB/my-foxx-service/path/to/visitedBy { data: { isBackup: true, text: '', isHint: true, continuance: 3441.5 }, from: 'Drop/27237133', to: 'Bot/41116378' }
return requestify.post (route, body)
在Foxx方面，我收到了请求，但是日志告诉我它没有正文：
On the Foxx side, I receive the request but the logs tell me it has no body :
router.post('/path/to/:param', function (req, res) {
console.log ('|| body :', req.body)
var data = req.body ;
var result = api.DoSomething (req.stateParams.param, data)
res.send(result)
})
.response(joi.object().required(), 'Entry stored in the collection.')
.summary('Summary')
.description('Description')
>> || body : [Object { "binarySlice" : function binarySlice() { [native code] }, "asciiSlice" : function asciiSlice() { [native code] }, "base64Slice" : function base64Slice() { [native code] }, "ucs2Slice" : function ucs2Slice() { [native code] }, "hexSlice" : f...
在节点方面，我也尝试了'request'模块。
On the node side I also tried the 'request' module.
return request.post(route, {form:body}, function (error, response, body) {
console.log('error:', error);
console.log('statusCode:', response && response.statusCode);
console.log('body:', body);
return response ;
});
我从Foxx获得相同的日志。
And I get the same logs from Foxx.
我做错了什么？
这是我在Foxx界面上操作的截图。我无法指定测试请求体是否正常？
Here is a screenshot of my operation on the Foxx interface. Is it normal that I cannot specify a request body for testing ?
推荐答案
我认为原因是因为你没有在Foxx的终点中指明有一个预期作为.post的一部分。
I think the reason is because you haven't specified in the end point in Foxx that there is a body expected as part of the .post.
我花了一段时间才找到定义Foxx MicroServices的方法，在我确定模式之前，我读了很多ArangoDB示例代码。
It took me a while to work out a way of defining Foxx MicroServices, and I read through a number of ArangoDB example code before I settled on a pattern.
为了帮助您入门，我提供了如何以可扩展的方式快速模拟Foxx MicroService代码，允许您将路由与模型分开。
To help you get started, I've provided how I would quickly mock up the Foxx MicroService code in a way that is extensible, allowing you to separate your Routes from your Models.
使用这些作为示例来使您的示例正常工作。
Use these as examples to get your example working.
我假设有两个文档集合，'Drop'和'Bot'的边缘集合j其中称为'VisitedBy'。
I've made assumptions that there are two document collections, 'Drop' and 'Bot' with an edge collection that joins them called 'VisitedBy'.
所有这些文件都存储在您的Foxx MicroService上：
All these files are stored on your Foxx MicroService:
main.js
'use strict';
module.context.use('/v1/visitedBy', require('./routes/visitedBy'), 'visitedBy');
routes / visitedBy。 js
'use strict';
const request = require('@arangodb/request');
const joi = require('joi');
const createRouter = require('@arangodb/foxx/router');
const VisitedBy = require('../models/visitedBy');
const visitedDataSchema = joi.object().required().description('Data that tracks a visited event');
const router = createRouter();
module.exports = router;
/*********************************************
* saveVisitedBy
* Path Params:
* none
* Query Params:
* none
* Body Params:
* body (required) The data that is used to record when something is visited
*/
router.post('/', function (req, res) {
const visitedData = req.body;
const savedData = VisitedBy.saveVisitedByData(VisitedBy.fromClient(visitedData));
if (savedData) {
res.status(200).send(VisitedBy.forClient(savedData));
} else {
res.status(500).send('Data not saved, internal error');
}
}, 'saveVisitedBy')
.body(visitedDataSchema, 'visited data')
.response(VisitedBy.savedDataSchema, 'The response after the data is saved')
.summary('Save visited data')
.description('Save visited data');
models / visitedBy。 js
'use strict';
const _ = require('lodash');
const joi = require('joi');
const db = require('@arangodb').db;
const visitedByEdgeCollection = 'VisitedBy';
/*
Schema for a response after saving visitedBy data
*/
const savedDataScema = {
id: joi.string(),
data: joi.object(),
_from: joi.string(),
_to: joi.string()
};
module.exports = {
savedDataSchema: savedDataScema,
forClient(obj) {
// Implement outgoing transformations here
// Remove keys on the base object that do not need to go through to the client
if (obj) {
obj = _.omit(obj, ['_id', '_rev', '_oldRev', '_key']);
}
return obj;
},
fromClient(obj) {
// Implement incoming transformations here
return obj;
},
saveVisitedByData(visitedData) {
const q = db._createStatement({
"query": `
INSERT {
_from: @from,
_to: @to,
data: @data,
date: DATE_NOW()
} IN @@col
RETURN MERGE ({ id: NEW._id }, NEW)
`
});
q.bind('@col', visitedByEdgeCollection);
q.bind('from', visitedData.from);
q.bind('to', visitedData.to);
q.bind('data', visitedData.data);
const res = q.execute().toArray();
return res[0];
}
};
您的服务应该在Swagger界面中显示如下：
Your service should look like this in the Swagger interface:
您可以了解有关使用joi定义数据结构的更多信息这里。
You can learn more about using joi to define data structures here.
需要一点时间习惯joi，但是一旦你得到了一些好的工作示例，您可以为传入和传出数据定义出色的数据定义。
It takes a bit getting used to joi, but once you get some good working examples you can define great data definitions for incoming and outgoing data.
我希望这有帮助，我很难获得一个基本的MicroService代码模型清楚事情是如何运作的，我相信这个例子可以做很多事，但它应该是一个很好的起点。
I hope this helps, it was difficult for me getting a basic MicroService code model that made it clear how things operated, I'm sure a lot can be done for this example but it should be a good starting spot.
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