From a7329efa5e9cadd2faf4428edbaed4b62a617979 Mon Sep 17 00:00:00 2001
From: Sharang Parnerkar <parnerkarsharang@gmail.com>
Date: Fri, 20 Feb 2026 06:52:00 +0100
Subject: [PATCH] fix(searxng): use POST instead of GET for SearXNG search API

SearXNG's default config sets `method: "POST"` which rejects GET
requests with 405. Switch both search_topic and get_trending_topics
to POST with form-encoded parameters.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 src/infrastructure/searxng.rs | 44 ++++++++++++++++++-----------------
 1 file changed, 23 insertions(+), 21 deletions(-)

diff --git a/src/infrastructure/searxng.rs b/src/infrastructure/searxng.rs
index d5d2322..4181c90 100644
--- a/src/infrastructure/searxng.rs
+++ b/src/infrastructure/searxng.rs
@@ -122,23 +122,21 @@ pub async fn search_topic(query: String) -> Result<Vec<NewsCard>, ServerFnError>
     // similar to how Perplexity reformulates queries before searching.
     let enriched_query = format!("{query} latest news");
 
-    // Build URL with query parameters using the url crate's encoder
-    // to avoid reqwest version conflicts between our dep and dioxus's.
-    // Key SearXNG params:
-    //   categories=news,general - prioritize news sources + supplement with general
-    //   time_range=month       - only recent results (last 30 days)
-    //   language=en            - English results
-    //   format=json            - machine-readable output
-    let encoded_query: String =
-        url::form_urlencoded::byte_serialize(enriched_query.as_bytes()).collect();
-    let search_url = format!(
-        "{searxng_url}/search?q={encoded_query}&format=json&language=en\
-         &categories=news,general&time_range=month"
-    );
+    // Use POST with form-encoded body because SearXNG's default config
+    // sets `method: "POST"` which rejects GET requests with 405.
+    let search_url = format!("{searxng_url}/search");
+    let params = [
+        ("q", enriched_query.as_str()),
+        ("format", "json"),
+        ("language", "en"),
+        ("categories", "news,general"),
+        ("time_range", "month"),
+    ];
 
     let client = reqwest::Client::new();
     let resp = client
-        .get(&search_url)
+        .post(&search_url)
+        .form(&params)
         .send()
         .await
         .map_err(|e| ServerFnError::new(format!("SearXNG request failed: {e}")))?;
@@ -207,12 +205,15 @@ pub async fn get_trending_topics() -> Result<Vec<String>, ServerFnError> {
     let searxng_url =
         std::env::var("SEARXNG_URL").unwrap_or_else(|_| "http://localhost:8888".into());
 
-    let encoded_query: String =
-        url::form_urlencoded::byte_serialize(b"trending technology AI").collect();
-    let search_url = format!(
-        "{searxng_url}/search?q={encoded_query}&format=json&language=en\
-         &categories=news&time_range=week"
-    );
+    // Use POST to match SearXNG's default `method: "POST"` setting
+    let search_url = format!("{searxng_url}/search");
+    let params = [
+        ("q", "trending technology AI"),
+        ("format", "json"),
+        ("language", "en"),
+        ("categories", "news"),
+        ("time_range", "week"),
+    ];
 
     let client = reqwest::Client::builder()
         .timeout(std::time::Duration::from_secs(5))
@@ -220,7 +221,8 @@ pub async fn get_trending_topics() -> Result<Vec<String>, ServerFnError> {
         .map_err(|e| ServerFnError::new(format!("HTTP client error: {e}")))?;
 
     let resp = client
-        .get(&search_url)
+        .post(&search_url)
+        .form(&params)
         .send()
         .await
         .map_err(|e| ServerFnError::new(format!("SearXNG trending search failed: {e}")))?;