Build Safer Link Previews for a Tencent RTC Community Chat

<p>A casual community prompt—share a pet photo, story, or favorite animal link—creates a surprisingly serious backend decision: <strong>should your chat server automatically fetch every URL that members post?</strong></p> <p>Automatic previews make a social space easier to browse. They also turn your infrastructure into an HTTP client controlled by untrusted input. A malicious or accidental URL co

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