add some more HTTP headers

3 files changed, 9 insertions, 3 deletions

diff --git a/README.md b/README.md
index 35f26ba..d5bd8ca 100644
--- a/README.md
+++ b/README.md
@@ -101,7 +101,8 @@ your custom needs. This is minimal sample source code:
             }
 
             /* print HTTP header */
-            fputs(CQR_MIMEHEADER, stdout);
+            fputs(CQR_HEADER_CONTENT_TYPE, stdout);
+            fputc('\n', stdout);
 
             /* write PNG data to stdout */
             if (fwrite(png->buffer, png->size, 1, stdout) != 1) {
diff --git a/cqrlogo.c b/cqrlogo.c
index 9ba947d..80b57e0 100644
--- a/cqrlogo.c
+++ b/cqrlogo.c
@@ -102,7 +102,10 @@ int main(int argc, char **argv) {
 		}
 
 		/* print HTTP header */
-		fputs(CQR_MIMEHEADER, stdout);
+		fputs(CQR_HEADER_CONTENT_TYPE, stdout);
+		fputs(CQR_HEADER_CONTENT_DISPOSITION, stdout);
+		fputs(CQR_HEADER_PRAGMA, stdout);
+		fputc('\n', stdout);
 
 		/* write PNG data to stdout */
 		if (fwrite(png->buffer, png->size, 1, stdout) != 1) {
diff --git a/lib/libcqrlogo.h b/lib/libcqrlogo.h
index 0a8429b..eb945b1 100644
--- a/lib/libcqrlogo.h
+++ b/lib/libcqrlogo.h
@@ -42,7 +42,9 @@ struct cqr_conf {
 	bool overwrite;
 };
 
-#define CQR_MIMEHEADER	 "Content-Type: image/png\n\n"
+#define CQR_HEADER_CONTENT_TYPE		"Content-Type: image/png\n"
+#define CQR_HEADER_CONTENT_DISPOSITION	"Content-Disposition: inline; filename=\"cqrlogo.png\"\n"
+#define CQR_HEADER_PRAGMA		"Pragma: no-cache\n"
 
 #define CQR_META_COMMENT	0x1
 #define CQR_META_REFERER	0x2