Allow for policy to be remotely generated.

package.json

@@ -1,6 +1,6 @@
 {
-  "name": "react-native-aws3",
-  "version": "0.0.8",
+  "name": "@timbrandin/react-native-aws3",
+  "version": "0.0.9",
   "description": "Pure JavaScript react native library for uploading to AWS S3",
   "author": {
     "name": "Ben Reinhart"

src/RNS3.js

@@ -3,44 +3,23 @@
  */
 
 import { Request } from './Request'
+import { setBodyAsParsedXML } from './utils';
 import { S3Policy } from './S3Policy'
 
 const AWS_DEFAULT_S3_HOST = 's3.amazonaws.com'
 
-const EXPECTED_RESPONSE_KEY_VALUE_RE = {
-  key: /<Key>(.*)<\/Key>/,
-  etag: /<ETag>"?([^"]*)"?<\/ETag>/,
-  bucket: /<Bucket>(.*)<\/Bucket>/,
-  location: /<Location>(.*)<\/Location>/,
-}
-
-const entries = o =>
-  Object.keys(o).map(k => [k, o[k]])
-
-const extractResponseValues = (responseText) =>
-  entries(EXPECTED_RESPONSE_KEY_VALUE_RE).reduce((result, [key, regex]) => {
-    const match = responseText.match(regex)
-    return { ...result, [key]: match && match[1] }
-  }, {})
-
-const setBodyAsParsedXML = (response) =>
-  ({
-    ...response,
-    body: { postResponse: response.text == null ? null : extractResponseValues(response.text) }
-  })
-
 export class RNS3 {
-  static put(file, options) {
-    options = {
-      ...options,
-      key: (options.keyPrefix || '') + file.name,
-      date: new Date,
-      contentType: file.type
+  static put(file, options, policy) {
+    if (!policy) {
+      policy = S3Policy.generate({
+        ...options,
+        key: (options.keyPrefix || '') + file.name,
+        date: new Date,
+        contentType: file.type
+      })
     }
-
     const url = `https://${options.bucket}.${options.awsUrl || AWS_DEFAULT_S3_HOST}`
     const method = "POST"
-    const policy = S3Policy.generate(options)
 
     return Request.create(url, method, policy)
       .set("file", file)

src/RNS3Client.js

@@ -0,0 +1,23 @@
+/**
+ * RNS3
+ */
+
+import { Request } from './Request'
+import { setBodyAsParsedXML } from './utils';
+
+const AWS_DEFAULT_S3_HOST = 's3.amazonaws.com'
+
+export class RNS3Client {
+  static put(file, options, policy) {
+    if (!policy) {
+      throw new Error('missing policy');
+    }
+    const url = `https://${options.bucket}.${options.awsUrl || AWS_DEFAULT_S3_HOST}`
+    const method = "POST"
+
+    return Request.create(url, method, policy)
+      .set("file", file)
+      .send()
+      .then(setBodyAsParsedXML)
+  }
+}

src/S3Policy.js

@@ -2,7 +2,8 @@
  * S3Policy
  */
 
-const CryptoJS = require('crypto-js');
+const HmacSHA256 = require('crypto-js').HmacSHA256;
+const Hex = require('crypto-js').enc.Hex;
 const Buffer = global.Buffer || require('buffer').Buffer;
 const { dateToString } = require('./DateUtils');
 
@@ -100,17 +101,17 @@ const getEncodedPolicy = (policy) => {
 }
 
 const getSignature = (base64EncodedPolicy, options) => {
-  return CryptoJS.HmacSHA256(
+  return HmacSHA256(
     base64EncodedPolicy,
     getSignatureKey(options)
-  ).toString(CryptoJS.enc.Hex);
+  ).toString(Hex);
 }
 
 const getSignatureKey = (options) => {
-   const kDate = CryptoJS.HmacSHA256(options.yyyymmddDate, "AWS4" + options.secretKey);
-   const kRegion = CryptoJS.HmacSHA256(options.region, kDate);
-   const kService = CryptoJS.HmacSHA256(AWS_SERVICE_NAME, kRegion);
-   const kSigning = CryptoJS.HmacSHA256(AWS_REQUEST_POLICY_VERSION, kService);
+   const kDate = HmacSHA256(options.yyyymmddDate, "AWS4" + options.secretKey);
+   const kRegion = HmacSHA256(options.region, kDate);
+   const kService = HmacSHA256(AWS_SERVICE_NAME, kRegion);
+   const kSigning = HmacSHA256(AWS_REQUEST_POLICY_VERSION, kService);
 
    return kSigning;
 }

src/utils.js

@@ -0,0 +1,21 @@
+const EXPECTED_RESPONSE_KEY_VALUE_RE = {
+  key: /<Key>(.*)<\/Key>/,
+  etag: /<ETag>"?([^"]*)"?<\/ETag>/,
+  bucket: /<Bucket>(.*)<\/Bucket>/,
+  location: /<Location>(.*)<\/Location>/,
+}
+
+const entries = o =>
+  Object.keys(o).map(k => [k, o[k]])
+
+const extractResponseValues = (responseText) =>
+  entries(EXPECTED_RESPONSE_KEY_VALUE_RE).reduce((result, [key, regex]) => {
+    const match = responseText.match(regex)
+    return { ...result, [key]: match && match[1] }
+  }, {})
+
+export const setBodyAsParsedXML = (response) =>
+  ({
+    ...response,
+    body: { postResponse: response.text == null ? null : extractResponseValues(response.text) }
+  })