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New: Write CSV attachment from JSON action (#56)
* Add "Write CSV attachment from JSON Array" action * Add "Write CSV attachment from JSON Object" action * Update sailor version to 2.6.5
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,119 @@ | ||
| const axios = require('axios'); | ||
| const csv = require('csv'); | ||
| const _ = require('lodash'); | ||
| const { messages } = require('elasticio-node'); | ||
| const client = require('elasticio-rest-node')(); | ||
| const logger = require('@elastic.io/component-logger')(); | ||
|
|
||
| const util = require('../util/util'); | ||
|
|
||
| const REQUEST_TIMEOUT = process.env.REQUEST_TIMEOUT || 10000; // 10s | ||
| const REQUEST_MAX_RETRY = process.env.REQUEST_MAX_RETRY || 7; | ||
| const REQUEST_RETRY_DELAY = process.env.REQUEST_RETRY_DELAY || 7000; // 7s | ||
| const REQUEST_MAX_CONTENT_LENGTH = process.env.REQUEST_MAX_CONTENT_LENGTH || 10485760; // 10MB | ||
|
|
||
| let stringifier; | ||
| let signedUrl; | ||
| let rowCount = 0; | ||
| let ax; | ||
| let putUrl; | ||
| let options; | ||
|
|
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| async function init(cfg) { | ||
| let delimiter; | ||
| switch (cfg.separator) { | ||
| case 'comma': { | ||
| delimiter = ','; | ||
| break; | ||
| } | ||
| case 'semicolon': { | ||
| delimiter = ';'; | ||
| break; | ||
| } | ||
| case 'space': { | ||
| delimiter = ' '; | ||
| break; | ||
| } | ||
| case 'tab': { | ||
| delimiter = '\t'; | ||
| break; | ||
| } | ||
| default: { | ||
| throw Error(`Unexpected separator type: ${cfg.separator}`); | ||
| } | ||
| } | ||
| const header = cfg.includeHeaders !== 'No'; | ||
| logger.trace('Using delimiter: \'%s\'', delimiter); | ||
| options = { | ||
| header, | ||
| delimiter, | ||
| }; | ||
|
|
||
| stringifier = csv.stringify(options); | ||
| signedUrl = await client.resources.storage.createSignedUrl(); | ||
| putUrl = signedUrl.put_url; | ||
| logger.trace('CSV file to be uploaded file to uri=%s', putUrl); | ||
| ax = axios.create(); | ||
| util.addRetryCountInterceptorToAxios(ax); | ||
| } | ||
| async function ProcessAction(msg) { | ||
| // eslint-disable-next-line consistent-this | ||
| const self = this; | ||
| let isError = false; | ||
| let errorValue = ''; | ||
|
|
||
| const columns = Object.keys(msg.body[0]); | ||
| rowCount = msg.body.length; | ||
| logger.trace('Configured column names:', columns); | ||
| let row = {}; | ||
|
|
||
| await _.each(msg.body, async (item) => { | ||
| const entries = Object.values(msg.body); | ||
| // eslint-disable-next-line no-restricted-syntax | ||
| for (const entry of entries) { | ||
| if (isError) { | ||
| break; | ||
| } | ||
| const values = Object.values(entry); | ||
| // eslint-disable-next-line no-restricted-syntax | ||
| for (const value of values) { | ||
| if (value !== null && value !== undefined && (typeof value === 'object' || Array.isArray(value))) { | ||
| isError = true; | ||
| errorValue = value; | ||
| break; | ||
| } | ||
| } | ||
| } | ||
| row = _.pick(item, columns); | ||
| await stringifier.write(row); | ||
| }); | ||
| self.logger.info('The resulting CSV file contains %s rows', rowCount); | ||
|
|
||
| if (isError) { | ||
| throw Error(`Inbound message should be a plain Object. At least one of entries is not a primitive type: ${JSON.stringify(errorValue)}`); | ||
| } | ||
|
|
||
| ax.put(putUrl, stringifier, { | ||
| method: 'PUT', | ||
| timeout: REQUEST_TIMEOUT, | ||
| retry: REQUEST_MAX_RETRY, | ||
| delay: REQUEST_RETRY_DELAY, | ||
| maxContentLength: REQUEST_MAX_CONTENT_LENGTH, | ||
| }); | ||
| stringifier.end(); | ||
|
|
||
| const messageToEmit = messages.newMessageWithBody({ | ||
| rowCount, | ||
| }); | ||
| const fileName = `${messageToEmit.id}.csv`; | ||
| messageToEmit.attachments[fileName] = { | ||
| 'content-type': 'text/csv', | ||
| url: signedUrl.get_url, | ||
| }; | ||
| self.logger.trace('Emitting message %j', messageToEmit); | ||
| await self.emit('data', messageToEmit); | ||
| await self.emit('end'); | ||
| } | ||
|
|
||
| exports.process = ProcessAction; | ||
| exports.init = init; |
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