headers module is done

Makefile

@@ -7,22 +7,23 @@ BIN_NAME = cfloor
 
 all: $(BIN_NAME)
 
-$(BIN_NAME): obj/main.o obj/networking.o obj/linked.o obj/logging.o obj/signals.o
+$(BIN_NAME): obj/main.o obj/networking.o obj/linked.o obj/logging.o obj/signals.o obj/headers.o
 	$(LD) $(LDFLAGS) -o $@ $^
 
-test: obj/test.o obj/networking.o obj/linked.o obj/logging.o obj/signals.o
+test: obj/test.o obj/networking.o obj/linked.o obj/logging.o obj/signals.o obj/headers.o
 	$(LD) $(LDFLAGS) -o $@ $^
 
 valgrind: CFLAGS += -static -g
 valgrind: clean test
 	valgrind --leak-check=yes ./test
 
-obj/main.o: src/networking.h src/linked.h src/logging.h src/signals.h src/misc.h
-obj/test.o: src/networking.h src/linked.h src/logging.h src/signals.h src/misc.h
+obj/main.o: src/networking.h src/linked.h src/logging.h src/signals.h src/misc.h src/headers.h
+obj/test.o: src/networking.h src/linked.h src/logging.h src/signals.h src/misc.h src/headers.h
 obj/networking.o: src/networking.h src/headers.h src/linked.h src/logging.h src/signals.h
 obj/linked.o: src/linked.h
 obj/logging.o: src/logging.h
 obj/signals.o: src/signals.h
+obj/headers.o: src/headers.h
 
 obj/%.o: src/%.c obj
 	$(CC) $(CFLAGS) -c -o $@ $<

src/headers.c

@@ -0,0 +1,120 @@
+#include <stdlib.h>
+#include <string.h>
+
+#include "headers.h"
+
+int headers_find(struct headers* headers, const char* key) {
+	for (int i = 0; i < headers->number; i++) {
+		if (strcmp(headers->headers[i].key, key) == 0)
+			return i;
+	}
+	return -1;
+}
+
+const char* headers_get(struct headers* headers, const char* key) {
+	int tmp = headers_find(headers, key);
+	if (tmp < 0)
+		return NULL;
+	return headers->headers[tmp].value;
+}
+
+int headers_mod(struct headers* headers, char* key, char* value) {
+	int index = headers_find(headers, key);
+	
+	if (index < 0) {
+		struct header* tmp = realloc(headers->headers, (headers->number + 1) * sizeof(struct header));
+		if (tmp == NULL) {
+			// we don't need to clean up this connection gets dropped anyway
+			return HEADERS_ALLOC_ERROR;
+		}
+
+		headers->headers = tmp;
+
+		index = headers->number++;
+	}
+
+	headers->headers[index] = (struct header) {
+		.key = key,
+		.value = value
+	};
+
+	return index;
+}
+
+int headers_parse(struct headers* headers, const char* _currentHeader, size_t length) {
+	char* key = NULL;
+	char* value = NULL;
+
+	char* currentHeader = malloc(length);
+	if (currentHeader == NULL)
+		return HEADERS_ALLOC_ERROR;
+
+	memcpy(currentHeader, _currentHeader, length);
+	// string terminator not needed
+
+	char* keyTmp = currentHeader;
+	char* valueTmp = NULL;
+
+	for(int i = 0; i < length; i++) {
+		if (currentHeader[i] == ':') {
+			keyTmp[i] = '\0';
+			valueTmp = currentHeader + i + 1;
+			length -= i + 1;
+			break;
+		}
+	}
+	if (length < 0) {
+		free(currentHeader);
+		return HEADERS_PARSE_ERROR;
+	}
+	if (valueTmp == NULL) {
+		free(currentHeader);
+		return HEADERS_PARSE_ERROR;
+	}
+	key = malloc(strlen(keyTmp) + 1);
+	if (key == NULL) {
+		free(currentHeader);
+		return HEADERS_ALLOC_ERROR;
+	}	
+	value = malloc(length + 1);
+	if (value == NULL) {
+		free(currentHeader);
+		return HEADERS_ALLOC_ERROR;
+	}
+	strcpy(key, keyTmp);
+	memcpy(value, valueTmp, length);
+	value[length] = '\0';
+
+	free(currentHeader);
+
+	int shift = 0;
+	for(int i = 0; i < strlen(value); i++) {
+		if (value[i] != ' ') {
+			shift = i;
+			break;
+		}
+	}
+	if (shift > 0) {
+		memmove(value, value + shift, strlen(value) - shift + 1);
+	}
+	for(int i = strlen(value) - 1; i >= 0; i--) {
+		if (value[i] != ' ') {
+			value[i + 1] = '\0';
+			break;
+		}
+	}
+
+	return headers_mod(headers, key, value);
+}
+
+void headers_free(struct headers* headers) {
+	for (int i = 0; i < headers->number; i++) {
+		if (headers->headers[i].key != NULL)
+			free(headers->headers[i].key);
+		if (headers->headers[i].value != NULL)
+			free(headers->headers[i].value);
+	}
+	
+	if (headers->headers != NULL)
+		free(headers->headers);
+}

src/headers.h

@@ -1,6 +1,9 @@
 #ifndef HEADERS_H
 #define HEADERS_H
 
+#define HEADERS_PARSE_ERROR (-1)
+#define HEADERS_ALLOC_ERROR (-2)
+
 struct header {
 	char* key;
 	char* value;
@@ -11,4 +14,9 @@ struct headers {
 	struct header* headers;
 };
 
+const char* headers_get(struct headers* headers, const char* key);
+int headers_mod(struct headers* headers, char* key, char* value);
+int headers_parse(struct headers* headers, const char* currentHeader, size_t length);
+void headers_free(struct headers* headers);
+
 #endif

src/test.c

@@ -13,6 +13,7 @@
 #include "linked.h"
 #include "logging.h"
 #include "signals.h"
+#include "headers.h"
 
 bool global = true;
 bool overall = true;
@@ -173,7 +174,24 @@ void testTimers() {
 	checkInt(counter, 100, "interval count");
 }
 
-handler_t handlerGetter(struct metaData metaData, const char* host) {
+void testHeaders() {
+	struct headers headers = (struct headers) {
+		.number = 0
+	};
+
+	char* tmp = "test:  Hello World  ";
+	checkInt(headers_parse(&headers, tmp, strlen(tmp)), 0, "parse ok");
+	tmp = "blablabla";
+	checkInt(headers_parse(&headers, tmp, strlen(tmp)), HEADERS_PARSE_ERROR, "parse error");
+	tmp = "test2: Hello World2";
+	checkInt(headers_parse(&headers, tmp, strlen(tmp)), 1, "parse ok");
+
+	checkString(headers_get(&headers, "test"), "Hello World", "value check");
+
+	headers_free(&headers);
+}
+
+handler_t handlerGetter(struct metaData metaData, const char* host, struct bind* bind) {
 	return NULL;
 }
 
@@ -202,6 +220,7 @@ int main(int argc, char** argv) {
 	test("linked lists", &testLinkedList);
 	test("logging", &testLogging);
 	test("signals", &testTimers);
+	test("headers", &testHeaders);
 
 
 	printf("\nOverall: %s\n", overall ? "OK" : "FAILED");