Add fetchManifest api

README.md

@@ -264,7 +264,7 @@ const space = await data.space();
 
 Upload a file in a streaming manner
 
-- file (File, require)
+- file (File, required)
 - onProgress (onProgress: (loaded: number, total: number) => void, optional)
 - returns [UploadResponse](./src/data/types.ts#85)
 
@@ -280,6 +280,20 @@ const upload = data.upload(file, (loaded: number, total: number) => {
 await upload.result();
 ```
 
+#### manifest
+
+Download only the dataset manifest from the network to the local node if it's not available locally.
+
+- cid (string, required)
+- returns [CodexManifest](./src/data/types.ts#3)
+
+Example:
+
+```js
+const cid = "QmYyQSo1c1Ym7orWxLYvCrM2EmxFTANf8wXmmE7DWjhx5N";
+const manifest = await data.fetchManifest(cid);
+```
+
 ### Debug
 
 The following API assume that you have already a node module loaded, example:

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@codex-storage/sdk-js",
-  "version": "0.0.8",
+  "version": "0.0.9",
   "description": "Codex SDK to interact with the Codex decentralized storage network.",
   "repository": {
     "type": "git",

src/data/data.ts

@@ -4,6 +4,7 @@ import { Fetch } from "../fetch-safe/fetch-safe";
 import type { SafeValue } from "../values/values";
 import type {
   CodexDataResponse,
+  CodexManifest,
   CodexNodeSpace,
   UploadResponse,
 } from "./types";
@@ -63,15 +64,15 @@ export class CodexData {
 
     const xhr = new XMLHttpRequest();
 
-    const promise = new Promise<SafeValue<string>>(async (resolve) => {
+    const promise = new Promise<SafeValue<string>>((resolve) => {
       xhr.upload.onprogress = (evt) => {
         if (evt.lengthComputable) {
           onProgress?.(evt.loaded, evt.total);
         }
       };
 
       xhr.open("POST", url, true);
-
+      // xhr.setRequestHeader("Content-Disposition", "attachment; filename=\"" + file.name + "\"")
       xhr.send(file);
 
       xhr.onload = function () {
@@ -145,4 +146,16 @@ export class CodexData {
 
     return res.data.body;
   }
+
+  /**
+    * Download only the dataset manifest from the network to the local node 
+    * if it's not available locally.
+   */
+  async fetchManifest(cid: string) {
+    const url = this.url + Api.config.prefix + `/data/${cid}/network/manifest`;
+
+    return Fetch.safeJson<CodexManifest>(url, {
+      method: "GET",
+    });
+  }
 }