fix: filter to English Wikipedia via POST with filter body

The structured contents API requires a POST request with the filter
in the JSON body to narrow results:
  {"filters": [{"field": "in_language.identifier", "value": "en"}]}

Replaces the non-functional query-string filter parameter.

1 files changed, 14 insertions, 2 deletions

diff --git a/api/handlers.go b/api/handlers.go
index d3a08fd..4299b74 100644
--- a/api/handlers.go
+++ b/api/handlers.go
@@ -3,6 +3,7 @@ package api
 import (
 	"context"
 	"io"
+	"bytes"
 	"database/sql"
 	"errors"
 	"encoding/json"
@@ -228,14 +229,25 @@ func (h *Handler) GetArticle(w http.ResponseWriter, r *http.Request) {
 	}
 
 	baseURL := "https://api.enterprise.wikimedia.com/v2/structured-contents/" + url.QueryEscape(article)
-	queryURL := baseURL + "?limit=1"
 
-	req, err := http.NewRequestWithContext(ctx, "GET", queryURL, nil)
+	body, err := json.Marshal(map[string]any{
+		"filters": []map[string]string{
+			{"field": "in_language.identifier", "value": "en"},
+		},
+	})
+	if err != nil {
+		serverError(w, "could not build request")
+		return
+	}
+
+	req, err := http.NewRequestWithContext(ctx, "POST", baseURL, bytes.NewReader(body))
 	if err != nil {
 		serverError(w, "could not build request")
 		return
 	}
 	req.Header.Set("Authorization", "Bearer "+acct.AccessToken)
+	req.Header.Set("Content-Type", "application/json")
+	queryURL := baseURL
 
 	start := time.Now()
 	resp, err := http.DefaultClient.Do(req)