[feature] Add a request ID and include it in logs (#1476)

This adds a lightweight form of tracing to GTS. Each incoming request is
assigned a Request ID which we then pass on and log in all our log
lines. Any function that gets called downstream from an HTTP handler
should now emit a requestID=value pair whenever it logs something.

Co-authored-by: kim <grufwub@gmail.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/internal/web/rss.go b/internal/web/rss.go
index 757c3ffb5..dccb49542 100644
--- a/internal/web/rss.go
+++ b/internal/web/rss.go
@@ -61,14 +61,16 @@ func (m *Module) GetRSSETag(urlPath string, lastModified time.Time, getRSSFeed f
 	return eTag, nil
 }
 
-func extractIfModifiedSince(header string) time.Time {
-	if header == "" {
+func extractIfModifiedSince(r *http.Request) time.Time {
+	hdr := r.Header.Get(ifModifiedSinceHeader)
+
+	if hdr == "" {
 		return time.Time{}
 	}
 
-	t, err := http.ParseTime(header)
+	t, err := http.ParseTime(hdr)
 	if err != nil {
-		log.Errorf("couldn't parse if-modified-since %s: %s", header, err)
+		log.Errorf(r.Context(), "couldn't parse if-modified-since %s: %s", hdr, err)
 		return time.Time{}
 	}
 
@@ -95,7 +97,7 @@ func (m *Module) rssFeedGETHandler(c *gin.Context) {
 	}
 
 	ifNoneMatch := c.Request.Header.Get(ifNoneMatchHeader)
-	ifModifiedSince := extractIfModifiedSince(c.Request.Header.Get(ifModifiedSinceHeader))
+	ifModifiedSince := extractIfModifiedSince(c.Request)
 
 	getRssFeed, accountLastPostedPublic, errWithCode := m.processor.AccountGetRSSFeedForUsername(ctx, username)
 	if errWithCode != nil {