Using Angular Typescript, implement a live chat feature that generates link previews

Question

Using Angular Typescript, implement a live chat feature that generates link previews

I am having trouble creating a link preview in live chat on my website. I want the preview of a dropped URL to show in the chat window, which requires extracting meta-data from the element of the resource (in that URL) like:

<meta property="og:image" content="https://baomoi-static.zadn.vn/web/styles/img/facebook-thumb.png">

. In my Angular TypeScript project, I am using the head() method of HttpClient as shown below:

getMetaData(url: string) {
    let headers = new HttpHeaders();
    headers = headers.append('Access-Control-Allow-Headers', '*');
    headers = headers.append('Access-Control-Allow-Methods', '*');
    headers = headers.append('Access-Control-Allow-Origin', '*');
    const options = {
      headers: headers,
      reportProgress: true,
      responseType: 'json',
    };
    return this.http.head(url, <HttpOptions>options);
  }

However, when I use this method of HttpClient, I encounter an error. Can someone assist me in resolving this issue or provide a solution for retrieving metadata from a specific URL? I am currently working on an Angular TypeScript project.

https://i.sstatic.net/0vr31.png

angular typescript metadata api-linkpreview

Answer 1

Answer №1

Make the following adjustments to the code before testing it out.

updateMetadata(endpoint: string) {
    let headers = new HttpHeaders();
    headers = headers.append('Access-Control-Allow-Headers', '*');
    headers = headers.append('Access-Control-Allow-Methods', '*');
    headers = headers.append('Access-Control-Allow-Origin', '*');
    headers = headers.append('Access-Control-Allow-Credentials', true);
    const options = {
      headers: headers,
      reportProgress: true,
      responseType: 'json',
    };
    return this.http.head(endpoint, <HttpOptions>options);
  }

Answer 2

Make the following adjustments to the code before testing it out.

updateMetadata(endpoint: string) {
    let headers = new HttpHeaders();
    headers = headers.append('Access-Control-Allow-Headers', '*');
    headers = headers.append('Access-Control-Allow-Methods', '*');
    headers = headers.append('Access-Control-Allow-Origin', '*');
    headers = headers.append('Access-Control-Allow-Credentials', true);
    const options = {
      headers: headers,
      reportProgress: true,
      responseType: 'json',
    };
    return this.http.head(endpoint, <HttpOptions>options);
  }

Using Angular Typescript, implement a live chat feature that generates link previews

Answer №1

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