Merge pull request #24 from vemonet/fix-fetch-get

Fix Content-Type header for `fetch` GET request
zazuko · Nov 26, 2024 · c29a16a · c29a16a
2 parents 8a5eab9 + c7ae45e
commit c29a16a
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diff --git a/.changeset/smooth-buckets-grab.md b/.changeset/smooth-buckets-grab.md
@@ -0,0 +1,5 @@
+---
+"@zazuko/yasqe": patch
+---
+
+Fix `Content-Type` header for `fetch` GET request 
diff --git a/packages/yasqe/src/sparql.ts b/packages/yasqe/src/sparql.ts
@@ -57,16 +57,19 @@ export async function executeQuery(yasqe: Yasqe, config?: YasqeAjaxConfig): Prom
       return; // Nothing to query
     }
     const abortController = new AbortController();
+
     const fetchOptions: RequestInit = {
       method: populatedConfig.reqMethod,
       headers: {
         Accept: populatedConfig.accept,
         ...(populatedConfig.headers || {}),
-        "Content-Type": populatedConfig.reqMethod === "POST" ? "application/x-www-form-urlencoded" : "",
       },
       credentials: populatedConfig.withCredentials ? "include" : "same-origin",
       signal: abortController.signal,
     };
+    if (fetchOptions?.headers && populatedConfig.reqMethod === "POST") {
+      (fetchOptions.headers as Record<string, string>)["Content-Type"] = "application/x-www-form-urlencoded";
+    }
     const searchParams = new URLSearchParams();
     for (const key in populatedConfig.args) {
       const value = populatedConfig.args[key];