From 6be0394059011a0b3a4770ddae22706232c38212 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Wed, 16 Mar 2022 09:20:48 +0100
Subject: [PATCH] make it build fine with HTTP-disabled

---
 include/curl/header.h |  3 ++-
 lib/headers.c         | 29 +++++++++++++++++++++++++++++
 lib/headers.h         |  7 +++++++
 3 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/include/curl/header.h b/include/curl/header.h
index cc7fbccbc84cd9..7e0d5322153030 100644
--- a/include/curl/header.h
+++ b/include/curl/header.h
@@ -46,7 +46,8 @@ typedef enum {
   CURLHE_MISSING,       /* no such header exists */
   CURLHE_NOHEADERS,     /* no headers at all exist (yet) */
   CURLHE_OUT_OF_MEMORY, /* out of memory while processing */
-  CURLHE_BAD_ARGUMENT,
+  CURLHE_BAD_ARGUMENT,  /* a function argument was not okay */
+  CURLHE_NOT_BUILT_IN   /* if API was disabled in the build */
 } CURLHcode;
 
 CURL_EXTERN CURLHcode curl_easy_header(CURL *easy,
diff --git a/lib/headers.c b/lib/headers.c
index 6f185e284fbf27..f2cbcdb84fddb3 100644
--- a/lib/headers.c
+++ b/lib/headers.c
@@ -33,6 +33,8 @@
 #include "curl_memory.h"
 #include "memdebug.h"
 
+#ifndef CURL_DISABLE_HTTP
+
 /* Generate the curl_header struct for the user. This function MUST assign all
    struct fields in the output struct. */
 static void copy_header_external(struct Curl_easy *data,
@@ -255,3 +257,30 @@ CURLcode Curl_headers_cleanup(struct Curl_easy *data)
   Curl_headers_init(data);
   return CURLE_OK;
 }
+
+#else /* HTTP-disabled builds below */
+
+CURLHcode curl_easy_header(CURL *easy,
+                           const char *name,
+                           size_t index,
+                           unsigned int type,
+                           struct curl_header **hout)
+{
+  (void)easy;
+  (void)name;
+  (void)index;
+  (void)type;
+  (void)hout;
+  return CURLHE_NOT_BUILT_IN;
+}
+
+struct curl_header *curl_easy_nextheader(CURL *easy,
+                                         unsigned int type,
+                                         struct curl_header *prev)
+{
+  (void)easy;
+  (void)type;
+  (void)prev;
+  return NULL;
+}
+#endif
diff --git a/lib/headers.h b/lib/headers.h
index c26a81f65f0a84..6bf59cdfc4f677 100644
--- a/lib/headers.h
+++ b/lib/headers.h
@@ -23,6 +23,8 @@
  ***************************************************************************/
 #include "curl_setup.h"
 
+#ifndef CURL_DISABLE_HTTP
+
 struct Curl_header_store {
   struct Curl_llist_element node;
   char *name;
@@ -46,4 +48,9 @@ CURLcode Curl_headers_init(struct Curl_easy *data);
  */
 CURLcode Curl_headers_cleanup(struct Curl_easy *data);
 
+#else
+#define Curl_headers_push(x,y,z) CURLE_NOT_BUILT_IN
+#define Curl_headers_cleanup(x) Curl_nop_stmt
+#endif
+
 #endif /* HEADER_CURL_HEADER_H */