Add HttpClient API

TODO.txt

@@ -15,7 +15,10 @@ Milestone: v0.3.0
     [ ] TLS
     [ ] SOCKS
     [ ] Multi-output
-[ ] HTTP Client API
+[~] HTTP Client API
+    [ ] Document HttpParseHeaders()
+    [ ] HttpClient man page
+    [ ] Test on other platforms
 [ ] Option to pretty-print Json
 
 [ ] Simple command line tool to make matrix requests

src/Http.c

@@ -26,9 +26,11 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <ctype.h>
 
 #include <Memory.h>
 #include <HashMap.h>
+#include <Util.h>
 
 #ifndef TELODENDRIA_STRING_CHUNK
 #define TELODENDRIA_STRING_CHUNK 64
@@ -532,3 +534,105 @@ HttpParamEncode(HashMap * params)
 
     return out;
 }
+
+HashMap *
+HttpParseHeaders(FILE * fp)
+{
+    HashMap *headers;
+
+    char *line;
+    ssize_t lineLen;
+    size_t lineSize;
+
+    char *headerKey;
+    char *headerValue;
+
+    if (!fp)
+    {
+        return NULL;
+    }
+
+
+    headers = HashMapCreate();
+    if (!headers)
+    {
+        return NULL;
+    }
+
+    line = NULL;
+    lineLen = 0;
+
+    while ((lineLen = UtilGetLine(&line, &lineSize, fp)) != -1)
+    {
+        char *headerPtr;
+
+        ssize_t i;
+
+        if (strcmp(line, "\r\n") == 0 || strcmp(line, "\n") == 0)
+        {
+            break;
+        }
+
+        for (i = 0; i < lineLen; i++)
+        {
+            if (line[i] == ':')
+            {
+                line[i] = '\0';
+                break;
+            }
+
+            line[i] = tolower((unsigned char) line[i]);
+        }
+
+        headerKey = Malloc((i + 1) * sizeof(char));
+        if (!headerKey)
+        {
+            goto error;
+        }
+
+        strcpy(headerKey, line);
+
+        headerPtr = line + i + 1;
+
+        while (isspace((unsigned char) *headerPtr))
+        {
+            headerPtr++;
+        }
+
+        for (i = lineLen - 1; i > (line + lineLen) - headerPtr; i--)
+        {
+            if (!isspace((unsigned char) line[i]))
+            {
+                break;
+            }
+            line[i] = '\0';
+        }
+
+        headerValue = Malloc(strlen(headerPtr) + 1);
+        if (!headerValue)
+        {
+            Free(headerKey);
+            goto error;
+        }
+
+        strcpy(headerValue, headerPtr);
+
+        HashMapSet(headers, headerKey, headerValue);
+        Free(headerKey);
+    }
+
+    Free(line);
+    return headers;
+
+error:
+    Free(line);
+
+    while (HashMapIterate(headers, &headerKey, (void **) &headerValue))
+    {
+        Free(headerValue);
+    }
+
+    HashMapFree(headers);
+
+    return NULL;
+}

src/HttpClient.c

@@ -0,0 +1,241 @@
+/*
+ * Copyright (C) 2022-2023 Jordan Bancino <@jordan:bancino.net>
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <HttpClient.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+
+#include <Http.h>
+#include <Memory.h>
+#include <Util.h>
+
+struct HttpClientContext
+{
+    HashMap *responseHeaders;
+    FILE *stream;
+};
+
+HttpClientContext *
+HttpRequest(HttpRequestMethod method, int flags, char *host, char *path, char *port)
+{
+    HttpClientContext *context;
+
+    int sd;
+    struct addrinfo hints, *res, *res0;
+    int error;
+
+    if (!method || !host || !path)
+    {
+        return NULL;
+    }
+
+    /* TODO: Not supported yet */
+    if (flags & HTTP_TLS)
+    {
+        return NULL;
+    }
+
+    context = Malloc(sizeof(HttpClientContext));
+    if (!context)
+    {
+        return NULL;
+    }
+
+    memset(&hints, 0, sizeof(hints));
+    hints.ai_family = AF_UNSPEC;
+    hints.ai_socktype = SOCK_STREAM;
+    error = getaddrinfo(host, port, &hints, &res0);
+
+    if (error)
+    {
+        Free(context);
+        return NULL;
+    }
+
+    for (res = res0; res; res = res->ai_next)
+    {
+        sd = socket(res->ai_family, res->ai_socktype,
+                    res->ai_protocol);
+
+        if (sd < 0)
+        {
+            continue;
+        }
+
+        if (connect(sd, res->ai_addr, res->ai_addrlen) < 0)
+        {
+            close(sd);
+            sd = -1;
+            continue;
+        }
+
+        break;
+    }
+
+    if (sd < 0)
+    {
+        Free(context);
+        return NULL;
+    }
+
+    freeaddrinfo(res0);
+
+    context->stream = fdopen(sd, "r+");
+    if (!context->stream)
+    {
+        Free(context);
+        close(sd);
+        return NULL;
+    }
+
+    fprintf(context->stream, "%s %s HTTP/1.0\r\n",
+            HttpRequestMethodToString(method), path);
+
+    HttpRequestHeader(context, "Connection", "close");
+    HttpRequestHeader(context, "User-Agent", "Telodendria/" TELODENDRIA_VERSION);
+
+    return context;
+}
+
+void
+HttpRequestHeader(HttpClientContext * context, char *key, char *val)
+{
+    if (!context || !key || !val)
+    {
+        return;
+    }
+
+    fprintf(context->stream, "%s: %s\r\n", key, val);
+}
+
+HttpStatus
+HttpRequestSend(HttpClientContext * context)
+{
+    HttpStatus status;
+
+    char *line = NULL;
+    ssize_t lineLen;
+    size_t lineSize = 0;
+    char *tmp;
+
+    if (!context)
+    {
+        return 0;
+    }
+
+    fprintf(context->stream, "\r\n");
+    fflush(context->stream);
+
+    lineLen = UtilGetLine(&line, &lineSize, context->stream);
+
+    /* Line must contain at least "HTTP/x.x xxx" */
+    if (lineLen < 12)
+    {
+        return 0;
+    }
+
+    if (!(strncmp(line, "HTTP/1.0", 8) == 0 ||
+          strncmp(line, "HTTP/1.1", 8) == 0))
+    {
+        return 0;
+    }
+
+    tmp = line + 9;
+
+    while (isspace(*tmp) && *tmp != '\0')
+    {
+        tmp++;
+    }
+
+    if (!*tmp)
+    {
+        return 0;
+    }
+
+    status = atoi(tmp);
+
+    if (!status)
+    {
+        return 0;
+    }
+
+    context->responseHeaders = HttpParseHeaders(context->stream);
+    if (!context->responseHeaders)
+    {
+        return 0;
+    }
+
+    return status;
+}
+
+HashMap *
+HttpResponseHeaders(HttpClientContext * context)
+{
+    if (!context)
+    {
+        return NULL;
+    }
+
+    return context->responseHeaders;
+}
+
+FILE *
+HttpClientStream(HttpClientContext * context)
+{
+    if (!context)
+    {
+        return NULL;
+    }
+
+    return context->stream;
+}
+
+void
+HttpClientContextFree(HttpClientContext * context)
+{
+    char *key;
+    void *val;
+
+    if (!context)
+    {
+        return;
+    }
+
+    while (HashMapIterate(context->responseHeaders, &key, &val))
+    {
+        Free(val);
+    }
+
+    HashMapFree(context->responseHeaders);
+
+    fclose(context->stream);
+    Free(context);
+}

src/HttpServer.c

@@ -96,13 +96,6 @@ HttpServerContextCreate(HttpRequestMethod requestMethod,
         return NULL;
     }
 
-    c->requestHeaders = HashMapCreate();
-    if (!c->requestHeaders)
-    {
-        Free(c);
-        return NULL;
-    }
-
     c->responseHeaders = HashMapCreate();
     if (!c->responseHeaders)
     {
@@ -515,6 +508,7 @@ HttpServerWorkerThread(void *args)
 
         if (strcmp(requestProtocol, "HTTP/1.1") != 0 && strcmp(requestProtocol, "HTTP/1.0") != 0)
         {
+            Free(requestPath);
             goto bad_request;
         }
 
@@ -533,65 +527,14 @@ HttpServerWorkerThread(void *args)
         context = HttpServerContextCreate(requestMethod, requestPath, requestParams, fp);
         if (!context)
         {
+            Free(requestPath);
             goto internal_error;
         }
 
-        while ((lineLen = UtilGetLine(&line, &lineSize, fp)) != -1)
+        context->requestHeaders = HttpParseHeaders(fp);
+        if (!context->requestHeaders)
         {
-            char *headerKey;
-            char *headerValue;
-            char *headerPtr;
-
-            if (strcmp(line, "\r\n") == 0)
-            {
-                break;
-            }
-
-            for (i = 0; i < lineLen; i++)
-            {
-                if (line[i] == ':')
-                {
-                    line[i] = '\0';
-                    break;
-                }
-
-                line[i] = tolower((unsigned char) line[i]);
-            }
-
-            headerKey = Malloc((i + 1) * sizeof(char));
-            if (!headerKey)
-            {
-                goto internal_error;
-            }
-
-            strcpy(headerKey, line);
-
-            headerPtr = line + i + 1;
-
-            while (isspace((unsigned char) *headerPtr))
-            {
-                headerPtr++;
-            }
-
-            for (i = lineLen - 1; i > (line + lineLen) - headerPtr; i--)
-            {
-                if (!isspace((unsigned char) line[i]))
-                {
-                    break;
-                }
-                line[i] = '\0';
-            }
-
-            headerValue = Malloc(strlen(headerPtr) + 1);
-            if (!headerValue)
-            {
-                goto internal_error;
-            }
-
-            strcpy(headerValue, headerPtr);
-
-            HashMapSet(context->requestHeaders, headerKey, headerValue);
-            Free(headerKey);
+            goto internal_error;
         }
 
         server->requestHandler(context, server->handlerArgs);

src/include/Http.h

@@ -125,4 +125,7 @@ extern HashMap *
 extern char *
  HttpParamEncode(HashMap *);
 
+extern HashMap *
+ HttpParseHeaders(FILE *);
+
 #endif

src/include/HttpClient.h

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2022-2023 Jordan Bancino <@jordan:bancino.net>
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef TELODENDRIA_HTTPCLIENT_H
+#define TELODENDRIA_HTTPCLIENT_H
+
+#include <stdio.h>
+
+#include <HashMap.h>
+#include <Http.h>
+
+#define HTTP_NONE 0
+#define HTTP_TLS (1 << 0)
+
+typedef struct HttpClientContext HttpClientContext;
+
+extern HttpClientContext *
+ HttpRequest(HttpRequestMethod, int, char *, char *, char *);
+
+extern void
+ HttpRequestHeader(HttpClientContext *, char *, char *);
+
+extern HttpStatus
+ HttpRequestSend(HttpClientContext *);
+
+extern HashMap *
+ HttpResponseHeaders(HttpClientContext *);
+
+extern FILE *
+ HttpClientStream(HttpClientContext *);
+
+extern void
+ HttpClientContextFree(HttpClientContext *);
+
+#endif                             /* TELODENDRIA_HTTPCLIENT_H */