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/URLImg2text/index.ts

@@ -0,0 +1,158 @@
+import { delay } from '@fastgpt/global/common/system/utils';
+import { addLog } from '@fastgpt/service/common/system/log';
+
+type Props = {
+  apikey: string;
+  url: string;
+  img_correction: boolean;
+  formula: boolean;
+};
+
+// Response type same as HTTP outputs
+type Response = Promise<{
+  result: string;
+  success: boolean;
+}>;
+
+const main = async ({ apikey, url, img_correction, formula }: 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 extension = url.split('.').pop()?.toLowerCase();
+  const name = url.split('/').pop()?.split('.').shift();
+  let mini = '';
+  switch (extension) {
+    case 'jpg':
+    case 'jpeg':
+      mini = 'image/jpeg';
+      break;
+    case 'png':
+      mini = 'image/png';
+      break;
+    default:
+      return {
+        result: `Not supported image format, only support jpg/jpeg/png`,
+        success: false
+      };
+  }
+
+  const response = await fetch(url);
+  if (!response.ok) {
+    return {
+      result: `Failed to fetch image from URL: ${url}`,
+      success: false
+    };
+  }
+
+  const blob = await response.blob();
+  const formData = new FormData();
+  formData.append('file', new Blob([blob], { type: mini }), name + '.' + extension);
+  formData.append('img_correction', img_correction ? '1' : '0');
+  formData.append('equation', formula ? '1' : '0');
+
+  let upload_url = 'https://api.doc2x.noedgeai.com/api/platform/async/img';
+  if (real_api_key.startsWith('sk-')) {
+    upload_url = 'https://api.doc2x.noedgeai.com/api/v1/async/img';
+  }
+
+  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) {
+      // Rate limit, wait for 10s and retry at most 3 times
+      if (upload_response.status === 429 && attempt < 3) {
+        await delay(10000);
+        continue;
+      }
+      return {
+        result: `Failed to upload image: ${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;
+  }
+  const maxAttempts = 100;
+  // Wait for the result, at most 100s
+  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') {
+      let result = result_data.data.result.pages[0].md;
+      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;