fix: show error message for tts model params not correct

[shaohuzhang1]

fix: show error message for tts model params not correct --bug=1051057 --user=刘瑞斌 【模型管理】语音合成模型有错误的参数，播放回答内容时没有反应 https://www.tapd.cn/57709429/s/1639429

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[shaohuzhang1]

The provided code looks generally clean and well-structured for its functionalities. However, there are a few improvements and optimizations that can be suggested:

1. Type Casting: Ensure type casting is used consistently throughout the code to avoid runtime errors.

   const id = prop.id as unknown; // Use as unknown if `prop` is not guaranteed to have an `id` property

2. Async/Await Handling: For asynchronous operations like file fetching, it's better to explicitly handle promises and avoid relying on chaining.

   // Assuming applicationApi.postTextToSpeech returns a promise
   async function playAnswerText(text: string) {
     try {
       const response = await applicationApi.postMessageToSpeech((props.applicationId as string) || (id as string), { text });
       
       if (response.status === 400 && response.headers['content-type'] !== 'application/json') {
         MsgError('Invalid request.');
         return;
       }
   
       // Process the response depending on its content type
       if (response.data.fileUrl) {
         // Handle file URL
       } else if (response.data.mp3Data) {
         // Convert mp3 data to audio element
       }
     } catch (error) {
       console.error('Error during speech synthesis:', error);
       msgError(error.message);
     }
   }

3. Comments and Documentation: Adding comments and documentation can help maintainability of the codebase.

   /**
    * Plays the given answer text using the speech synthesizer API.
    * Handles JSON responses differently from other types of responses.
    *
    * @param text The text to be synthesized.
    */
   async function playAnswerText(text: string) {
     // Your implementation here...
   }

4. Error Logging: Consider adding logging mechanisms to record errors effectively, especially when dealing with network requests or unexpected behavior.

5. Input Validation: Validate inputs before making API calls to prevent bugs caused by invalid data.

By applying these recommendations, the code will become more robust, readable, and maintainable.

[shaohuzhang1]

There is one main issue in the provided code snippet:

1. Potential Memory Leak with MsgError: If a network request fails or returns an unexpected response that still contains HTML/XML content, the MsgError function might attempt to parse it, leading to unnecessary memory allocations.

2. Optimization: Since you are using await res.text() when the response type is JSON, consider checking the contentType header of the response before attempting to read body content as text. This can prevent unnecessary conversions and improve performance.

3. Code Structure Review:

   const playAnswerText = (text: string) => {
     if (!response || !response.ok) {
       console.error('Network Error:', error);
       return;
     }
     
     switch (response.headers.get('Content-Type')) {
       case 'application/json':
         const jsonData = await response.json();
         displayJsonData(jsonData); // Your custom handling for JSON data
         break;
       default:
         downloadFileFromResponse(response);
         break;
     }
   }

### Suggested Changes:
- **Avoid Parsing Non-JSON Responses:** Before converting non-JSON responses to strings (`async res.text()`) check the response's Content-Type Header.
 
 **Updated Code Snippet:**

 ```typescript
 playAnswerText(text: string) {
   try {
     applicationApi.postTextToSpeech(
       id || props.applicationId,
       { text },
       false
     )
       .then(async (res) => {
         switch (res.status) {
           case 200:
             if (!res.headers.has('content-type') || /json$/.test(res.headers get('content-type'))) {
               const responseData = await res.json(); // Attempt to parse json even without specific MIME types.
                 ... handle json response ...
             } else {
                 ... process other content-types if needed...
             }
             // Continue normal execution after successful parsing
             ......
             
            // Downloading file from response if necessary.
            const url = window.URL.createObjectURL(new Blob([res]));
            const link = document.createElement("a");
            link.style.display = "none";
            link.href = url;
            link.download = "downloadedFile.mp3"; // Specify appropriate filename here.
            
            document.body.appendChild(link);
            link.click();

            window.URL.revokeObjectURL(url);

             break;

           case 4XX:
           case 5XX:
             const message = await res.text();
              MsgError(message);
             break;

           default:
             break; // Other status codes that you may need to handle appropriately.
         }
      
         
       })
       .catch(error => {
         console.error('Failed POST', error.message);
          MsgError(`Error ${error.message}`);
       });
     
       
   } catch (parseErr) {
     console.log(parseErr);
      MsgError(`Parse Error: ${parseErr}`);

Summary:

The suggested changes address the memory leak risk by checking and dealing with non-json responses carefully, preventing unnecessary attempts at parsing them into text. Additionally, proper logging and clear separation between error states are maintained throughout the processing flow.