File upload (#20)

* Add Support for FileUpload

src/httpClient.js

@@ -1,9 +1,11 @@
 const axios = require("axios");
+const FormData = require('form-data')
+const fs = require('fs')
 
 const METHOD_GET = 'GET'
 const METHOD_POST = 'POST'
 
-const request = async({ method, instanceConfig, data, auth, actions, preventFailureOnNoResponse, escapeData }) => {
+const request = async({ method, instanceConfig, data, files, auth, actions, preventFailureOnNoResponse, escapeData }) => {
   try {
     const instance = axios.create(instanceConfig);
 
@@ -17,6 +19,21 @@ const request = async({ method, instanceConfig, data, auth, actions, preventFail
       data = undefined;
     }
 
+    if (files && files !== '{}') {
+      filesJson = convertToJSON(files)
+      dataJson = convertToJSON(data)
+
+      if (Object.keys(filesJson).length > 0) {
+        try {
+          data = convertToFormData(dataJson, filesJson)
+          instanceConfig = await updateConfig(instanceConfig, data, actions)
+        } catch(error) {
+          actions.setFailed({ message: `Unable to convert Data and Files into FormData: ${error.message}`, data: dataJson, files: filesJson })
+          return
+        }
+      }
+    }
+
     const requestData = {
       auth,
       method,
@@ -45,6 +62,54 @@ const request = async({ method, instanceConfig, data, auth, actions, preventFail
   }
 }
 
+const convertToJSON = (value) => {
+  try {
+    return JSON.parse(value)
+  } catch(e) {
+    return {}
+  }
+}
+
+const convertToFormData = (data, files) => {
+  formData = new FormData()
+
+  for (const [key, value] of Object.entries(data)) {
+    formData.append(key, value)
+  }
+
+  for (const [key, value] of Object.entries(files)) {
+    formData.append(key, fs.createReadStream(value))
+  }
+
+  return formData
+}
+
+const updateConfig = async (instanceConfig, formData, actions) => {
+  try {
+    return { 
+      ...instanceConfig, 
+      headers: { 
+        ...instanceConfig.headers, 
+        ...formData.getHeaders(), 
+        'Content-Length': await contentLength(formData) 
+      }
+    }
+  } catch(error) {
+    actions.setFailed({ message: `Unable to read Content-Length: ${error.message}`, data, files })
+  }
+}
+
+const contentLength = (formData) => new Promise((resolve, reject) => {
+  formData.getLength((err, length) => {
+    if (err) {
+      reject (err)
+      return
+    }
+
+    resolve(length)
+  })
+})
+
 module.exports = {
   request,
   METHOD_POST,

src/index.js

@@ -37,8 +37,9 @@ const instanceConfig = {
 core.debug('Instance Configuration: ' + JSON.stringify(instanceConfig))
 
 const data = core.getInput('data') || '{}';
+const files = core.getInput('files') || '{}';
 const method = core.getInput('method') || METHOD_POST;
 const preventFailureOnNoResponse = core.getInput('preventFailureOnNoResponse') === 'true';
 const escapeData = core.getInput('escapeData') === 'true';
 
-request({ data, method, instanceConfig, auth, preventFailureOnNoResponse, escapeData, actions: new GithubActions() })
+request({ data, method, instanceConfig, auth, preventFailureOnNoResponse, escapeData, files, actions: new GithubActions() })