添加插件：Doc2X 图片/文档识别 (#2097)

* Init the requrest part

* Finish the img deal part

* For test only one plugin

* Finish img2text part

* Finish pdf ocr part

* Change vscode setting back

* Change `for` into` for await` type

packages/plugins/src/Doc2X/URLPDF2text/index.ts

@@ -0,0 +1,130 @@
+import { delay } from '@fastgpt/global/common/system/utils';
+import { addLog } from '@fastgpt/service/common/system/log';
+
+type Props = {
+  apikey: string;
+  url: string;
+  ocr: boolean;
+};
+
+// Response type same as HTTP outputs
+type Response = Promise<{
+  result: string;
+  success: boolean;
+}>;
+
+const main = async ({ apikey, url, ocr }: Props): Response => {
+  // Check the apikey
+  if (!apikey) {
+    return {
+      result: `API key is required`,
+      success: false
+    };
+  }
+
+  let real_api_key = apikey;
+  if (!apikey.startsWith('sk-')) {
+    const response = await fetch('https://api.doc2x.noedgeai.com/api/token/refresh', {
+      method: 'POST',
+      headers: {
+        Authorization: `Bearer ${apikey}`
+      }
+    });
+    if (response.status !== 200) {
+      return {
+        result: `Get token failed: ${await response.text()}`,
+        success: false
+      };
+    }
+    const data = await response.json();
+    real_api_key = data.data.token;
+  }
+
+  //Get the image binary from the URL
+  const formData = new FormData();
+  formData.append('pdf_url', url);
+  formData.append('ocr', ocr ? '1' : '0');
+
+  let upload_url = 'https://api.doc2x.noedgeai.com/api/platform/async/pdf';
+  if (real_api_key.startsWith('sk-')) {
+    upload_url = 'https://api.doc2x.noedgeai.com/api/v1/async/pdf';
+  }
+
+  let uuid;
+  const uploadAttempts = [1, 2, 3];
+  for await (const attempt of uploadAttempts) {
+    const upload_response = await fetch(upload_url, {
+      method: 'POST',
+      headers: {
+        Authorization: `Bearer ${real_api_key}`
+      },
+      body: formData
+    });
+    if (!upload_response.ok) {
+      if (upload_response.status === 429 && attempt < 3) {
+        await delay(10000);
+        continue;
+      }
+      return {
+        result: `Failed to upload file: ${await upload_response.text()}`,
+        success: false
+      };
+    }
+    const upload_data = await upload_response.json();
+    uuid = upload_data.data.uuid;
+    break;
+  }
+
+  // Get the result by uuid
+  let result_url = 'https://api.doc2x.noedgeai.com/api/platform/async/status?uuid=' + uuid;
+  if (real_api_key.startsWith('sk-')) {
+    result_url = 'https://api.doc2x.noedgeai.com/api/v1/async/status?uuid=' + uuid;
+  }
+
+  let result = '';
+  // Wait for the result, at most 100s
+  const maxAttempts = 100;
+  for await (const _ of Array(maxAttempts).keys()) {
+    const result_response = await fetch(result_url, {
+      headers: {
+        Authorization: `Bearer ${real_api_key}`
+      }
+    });
+    if (!result_response.ok) {
+      return {
+        result: `Failed to get result: ${await result_response.text()}`,
+        success: false
+      };
+    }
+    const result_data = await result_response.json();
+    if (['ready', 'processing'].includes(result_data.data.status)) {
+      await delay(1000);
+    } else if (result_data.data.status === 'pages limit exceeded') {
+      return {
+        result: 'Doc2X Pages limit exceeded',
+        success: false
+      };
+    } else if (result_data.data.status === 'success') {
+      result = await Promise.all(
+        result_data.data.result.pages.map((page: { md: any }) => page.md)
+      ).then((pages) => pages.join('\n'));
+      result = result.replace(/\\[\(\)]/g, '$').replace(/\\[\[\]]/g, '$$');
+      return {
+        result: result,
+        success: true
+      };
+    } else {
+      return {
+        result: `Failed to get result: ${await result_data.text()}`,
+        success: false
+      };
+    }
+  }
+
+  return {
+    result: 'Timeout waiting for result',
+    success: false
+  };
+};
+
+export default main;