Potential fix for code scanning alert no. 71: Incomplete URL substring sanitization (#13318)

Potential fix for
[https://github.com/infiniflow/ragflow/security/code-scanning/71](https://github.com/infiniflow/ragflow/security/code-scanning/71)

In general, instead of using `String.prototype.includes` on the entire
URL string, parse the URL and make decisions based on its `host` (or
`hostname`) field. This avoids cases where the trusted domain appears in
the path, query, or as part of a different hostname.

Here, `payload.source_fid` is set to `'siliconflow_intl'` if
`postBody.base_url` “contains” `api.siliconflow.com`. To keep behavior
for correct inputs but close the hole, we should:

1. Safely parse `postBody.base_url` using the standard `URL` class.
2. Extract the hostname (`url.hostname`).
3. Compare it appropriately:
- If we only want the exact host `api.siliconflow.com`, use strict
equality.
- If international endpoints may include subdomains like
`foo.api.siliconflow.com`, allow those via suffix check on the hostname.
4. Fall back to `LLMFactory.SILICONFLOW` if parsing fails or the host
does not match.

Concretely, in `web/src/pages/user-setting/setting-model/hooks.tsx`, in
the `onApiKeySavingOk` callback where `payload.source_fid` is set,
replace the `toLowerCase().includes('api.siliconflow.com')` logic with a
small block that:

- Initializes a local `let sourceFid = LLMFactory.SILICONFLOW;`
- If `postBody.base_url` is present, attempts `new
URL(postBody.base_url)` inside a `try/catch`, lowercases `url.hostname`,
and checks whether it equals `api.siliconflow.com` or ends with
`.api.siliconflow.com`.
- Assigns `payload.source_fid = sourceFid`.

No new external dependencies are required; `URL` is available in modern
browsers and Node, and TypeScript understands it.


_Suggested fixes powered by Copilot Autofix. Review carefully before
merging._

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

web/src/pages/user-setting/setting-model/hooks.tsx

@@ -49,11 +49,23 @@ export const useSubmitApiKey = () => {
         verify: isVerify,
       };
       if (savingParams.llm_factory === LLMFactory.SILICONFLOW) {
-        payload.source_fid = (postBody.base_url || '')
-          .toLowerCase()
-          .includes('api.siliconflow.com')
-          ? 'siliconflow_intl'
-          : LLMFactory.SILICONFLOW;
+        let sourceFid = LLMFactory.SILICONFLOW;
+        const baseUrl = postBody.base_url;
+        if (baseUrl) {
+          try {
+            const parsed = new URL(baseUrl);
+            const host = parsed.hostname.toLowerCase();
+            if (
+              host === 'api.siliconflow.com' ||
+              host.endsWith('.api.siliconflow.com')
+            ) {
+              sourceFid = 'siliconflow_intl';
+            }
+          } catch {
+            // ignore invalid URL and keep default sourceFid
+          }
+        }
+        payload.source_fid = sourceFid;
       }
 
       const ret = await saveApiKey(payload);