X-Git-Url: https://git.sesse.net/?p=cubemap;a=blobdiff_plain;f=parse.h;h=a2e35802d38d31e804e4b16dcf1f948df6f7cfa7;hp=de260640f56ebc4a0cbe0f6b06a39ead8d6bcbc0;hb=fa431bfab848624c2490a1134e084e6c1dd0dbfa;hpb=488f28bf7070f44469a006ed4a9d4c423788d175

diff --git a/parse.h b/parse.h
index de26064..a2e3580 100644
--- a/parse.h
+++ b/parse.h
@@ -5,14 +5,52 @@
 
 #include <stddef.h>
 #include <string>
+#include <algorithm>
+#include <string>
+#include <unordered_map>
 #include <vector>
 
+// Locale-unaware tolower(); matches RFC 2616 no matter what the locale is set to.
+static inline char ascii_tolower(const char ch)
+{
+	if (ch >= 'A' && ch <= 'Z') {
+		return ch + 'a' - 'A';
+	} else {
+		return ch;
+	}
+}
+
+// Case-insensitive header comparison and hashing.
+struct HTTPLess {
+	bool operator() (const std::string &a, const std::string &b) const
+	{
+		return std::lexicographical_compare(
+			begin(a), end(a), begin(b), end(b),
+			[](char a, char b) {
+				return ascii_tolower(a) < ascii_tolower(b);
+			});
+	}
+};
+struct HTTPHash {
+	size_t operator() (const std::string &s) const
+	{
+		std::string s_low = s;
+		for (char &ch : s_low) { ch = ascii_tolower(ch); }
+		return std::hash<std::string>() (s_low);
+	}
+};
+using HTTPHeaderMultimap = std::unordered_multimap<std::string, std::string, HTTPHash, HTTPLess>;
+
 // Split a line on whitespace, e.g. "foo  bar baz" -> {"foo", "bar", "baz"}.
 std::vector<std::string> split_tokens(const std::string &line);
 
 // Split a string on \n or \r\n, e.g. "foo\nbar\r\n\nbaz\r\n\r\n" -> {"foo", "bar", "baz"}.
 std::vector<std::string> split_lines(const std::string &str);
 
+// Extract HTTP headers from a request or response. Ignores the first line,
+// where the verb or the return code is.
+HTTPHeaderMultimap extract_headers(const std::vector<std::string> &lines, const std::string &log_context);
+
 // Add the new data to an existing string, looking for \r\n\r\n
 // (typical of HTTP requests and/or responses). Will return one
 // of the given statuses.