selfcare init

proxy_c/selfcare_httpsrv.c

@@ -0,0 +1,463 @@
+#include <event2/thread.h>
+#include "selfcare_httpsrv.h"
+#include "log.h"
+#include "selfcare_config.h"
+
+static selfcare_elem_s g_elems_arr[SELFCARE_TYPE_MAX];
+
+
+char uri_root[512];
+
+static const struct table_entry {
+    const char *extension;
+    const char *content_type;
+} content_type_table[] = {
+    { "txt", "text/plain" }, 
+    { "c", "text/plain" }, 
+    { "h", "text/plain" }, 
+    { "html", "text/html" }, 
+    { "htm", "text/html" },
+    { "css", "text/css" },
+    { "gif", "image/gif" }, 
+    { "jpg", "image/jpg" }, 
+    { "jpeg", "image/jpeg" }, 
+    { "png", "image/png" }, 
+    { "pdf", "application/pdf" }, 
+    { "ps", "application/postscript" }, 
+    { NULL, NULL },
+};
+
+/* Try to guess a good content-type for 'path' */
+const char* guess_content_type(const char *path)
+{
+    const char *last_period, *extension;
+    const struct table_entry *ent;
+    last_period = strrchr(path, '.');
+    if (!last_period || strchr(last_period, '/'))
+    {
+        goto not_found;
+    }
+
+    extension = last_period + 1;
+    for (ent = &content_type_table[0]; ent->extension; ++ent)
+    {
+        if (!evutil_ascii_strcasecmp(ent->extension, extension))
+        {
+            return ent->content_type;
+        }
+    }
+
+not_found:
+    return "application/misc";
+}
+
+
+/* Callbase used for the /dump URI, and for every non-get request:
+** dumps all information to stdout and gives base a trivial 200 ok */
+static void _httpserv_request_cb(struct evhttp_request *req, void *arg)
+{
+	int ret;
+
+    ret = selfcare_httpsrv_check(req, arg);
+    if(ret != SUCCESS)
+    {
+        return ;
+    }
+
+    // _httpserv_queue_enter(req, arg);
+}
+
+/* This callback gets invoked when we get and http request than doesn't match 
+* any other callback. Like any evhttp server callback, it has a simple job:
+* it must eventually call evhttp_send_error() or evhttp_send_reply(). 
+*/
+void _httpserv_senddoc_cb(struct evhttp_request *req, void *arg)
+{
+    struct evbuffer *evb = NULL;
+    const char *docroot = arg;
+    const char *uri = evhttp_request_get_uri(req);
+    struct evhttp_uri *decoded = NULL;
+    const char *path;
+    char *decoded_path;
+    char *whole_path = NULL;
+    size_t len;
+    int fd = -1;
+    struct stat st;
+
+    if (evhttp_request_get_command(req) != EVHTTP_REQ_GET)
+    {
+        _httpserv_request_cb(req, arg);
+        return;
+    }
+
+    LOG_D("Got a GET request for <%s>\n", uri);
+
+    /* Decode the URI */
+    decoded = evhttp_uri_parse(uri);
+    if (!decoded)
+    {
+        LOG_E("It's not a good URI, Sneding BADREQUEST\n");
+        evhttp_send_error(req, HTTP_BADREQUEST, 0);
+        return;
+    }
+
+    /* Let's see what path the user asked for. */
+    path = evhttp_uri_get_path(decoded);
+    if (!path)
+    {
+        path = "/";
+    }
+
+    /* We need to decode it, to see what path the user really wanted */
+    decoded_path = evhttp_uridecode(path, 0, NULL);
+    if (decoded_path == NULL)
+    {
+        goto err;
+    }
+
+    /* Don't allow any ".."'s in the path, to avoid exposing stuff outside 
+    * of the docroot. This test is both overzealous and underzealous:
+    * it forbids aceptable paths like "/this/one..here", but it doesn't
+    * do anything to prevent symlink following. */
+    if (strstr(decoded_path, ".."))
+    {
+        goto err;
+    }
+
+    len = strlen(decoded_path) + strlen(docroot) + 2;
+    if (!(whole_path = malloc(len)))
+    {
+        perror("malloc");
+        goto err;
+    }
+    evutil_snprintf(whole_path, len, "%s/%s", docroot, decoded_path);
+
+    if (stat(whole_path, &st) < 0)
+    {
+        goto err;
+    }
+
+    /* This holds the content we're sending */
+    evb = evbuffer_new();
+
+    if (S_ISDIR(st.st_mode))
+    {
+        /* If it's a directory, read the comments and make a little index page */
+        DIR *d;
+        struct dirent *ent;
+        const char *trailing_slash = "";
+
+        if (!strlen(path) || path[strlen(path) - 1] != '/')
+        {
+            trailing_slash = "/";
+        }
+
+        if (!(d = opendir(whole_path)))
+        {
+            goto err;
+        }
+
+        evbuffer_add_printf(evb, 
+            "<!DOCTYPE html>\n"
+            "<html>\n  "
+            "  <head>\n"
+            "    <meta charset='utf-8'>\n"
+            "    <title>%s</title>\n"
+            "    <base href='%s%s'>\n"
+            "  </head>\n"
+            "  <body>\n"
+            "    <h1>%s</h1>\n"
+            "    <ul>\n", 
+            decoded_path, /* xxx html-escape this. */
+            path, /* xxx html-escape this? */
+            trailing_slash, 
+            decoded_path /* xx html-escape this */
+            );
+
+        while ((ent = readdir(d)))
+        {
+            const char *name = ent->d_name;
+            evbuffer_add_printf(evb,
+                "    <li><a href=\"%s\">%s</a>\n", name, name);
+        }
+
+        evbuffer_add_printf(evb, "</ul></body></html>\n");
+        closedir(d);
+        evhttp_add_header(evhttp_request_get_output_headers(req),
+            "Content-Type", "text/html");
+    }
+    else
+    {
+        /* Otherwise it's a file; and it to the buffer to get send via sendfile */
+        const char *type = guess_content_type(decoded_path);
+        if ((fd = open(whole_path, O_RDONLY)) < 0)
+        {
+            perror("open");
+            goto err;
+        }
+
+        if (fstat(fd, &st) < 0)
+        {
+            /* Make sure the length still matches, now that we opened the file :/ */
+            perror("fstat");
+            goto err;
+        }
+        evhttp_add_header(evhttp_request_get_output_headers(req),
+            "Content-Type", type);
+        evbuffer_add_file(evb, fd, 0, st.st_size);
+    }
+
+    evhttp_send_reply(req, 200, "OK", evb);
+    goto done;
+
+err:
+    evhttp_send_error(req, 404, "Document was not found");
+    if (fd >= 0)
+    {
+        close(fd);
+    }
+
+done:
+    if (decoded)
+    {
+        evhttp_uri_free(decoded);
+    }
+
+    if (decoded_path)
+    {
+        free(decoded_path);
+    }
+
+    if (whole_path)
+    {
+        free(whole_path);
+    }
+
+    if (evb)
+    {
+        evbuffer_free(evb);
+    }
+}
+
+static int _httpserv_init(int argc, char **argv)
+{
+    struct event_base *base;
+    struct evhttp *http;
+    struct evhttp_bound_socket *handle;
+
+    if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
+    {
+        printf("signal error, errno[%d], error[%s]", errno, strerror(errno));
+        return -1;
+    }
+    evthread_use_pthreads();
+    base = event_base_new();
+    if (!base)
+    {
+        printf("Couldn't create an event_base:exiting\n");
+        return -1;
+    }
+
+    /* Create a new http oject to handle request */
+    http = evhttp_new(base);
+    if (!http)
+    {
+        printf("Couldn't create evhttp.Exiting\n");
+        return -1;
+    }
+
+    /* The /dump URI will dump all requests to stdout and say 200 ok */
+	int i;
+	for(i = SELFCARE_TYPE_MIN; i < SELFCARE_TYPE_MAX; ++i)
+	{
+		if(g_elems_arr[i].handle != NULL)
+		{
+			/* ע<><D7A2><EFBFBD>ص<EFBFBD><D8B5>ϲ㶨<CFB2><E3B6A8><EFBFBD>Ļص<C4BB><D8B5><EFBFBD><EFBFBD><EFBFBD> */
+			evhttp_set_cb(http, g_elems_arr[i].url_addr, g_elems_arr[i].handle, NULL);
+		}
+		else
+		{
+			/* ע<><D7A2>Ĭ<EFBFBD>ϵĻص<C4BB><D8B5><EFBFBD><EFBFBD><EFBFBD> */
+			evhttp_set_cb(http, "/dump", _httpserv_request_cb, NULL);
+		}
+	}
+    
+
+    /* We want to accept arbitrary requests, so we need to set a "generic" cb
+    * We can also add callbacks for specific paths */
+    // evhttp_set_gencb(http, _httpserv_senddoc_cb, argv[1]);
+
+    /* Now we teel the evhttp what port to listen on */
+    handle = evhttp_bind_socket_with_handle(http, "0.0.0.0", selfcare_config_get()->http_local_port);
+    if (!handle)
+    {
+        printf("Couldn't bind to port[%d], exiting\n", selfcare_config_get()->http_local_port);
+        return -1;
+    }
+
+    {
+        /* Extract and display the address we're listening on. */
+        struct sockaddr_storage ss;
+        evutil_socket_t fd;
+        ev_socklen_t socklen = sizeof(ss);
+        char addrbuf[128];
+        void *inaddr;
+        const char *addr;
+        int got_port = -1;
+        fd = evhttp_bound_socket_get_fd(handle);
+        memset(&ss, 0, sizeof(ss));
+        if (getsockname(fd, (struct sockaddr *)&ss, &socklen))
+        {
+            perror("getsockname() failed");
+            return -1;
+        }
+
+        if (ss.ss_family == AF_INET)
+        {
+            got_port = ntohs(((struct sockaddr_in*)&ss)->sin_port);
+            inaddr = &((struct sockaddr_in*)&ss)->sin_addr;
+        }
+        else if (ss.ss_family == AF_INET6)
+        {
+            got_port = ntohs(((struct sockaddr_in6*)&ss)->sin6_port);
+            inaddr = &((struct sockaddr_in6*)&ss)->sin6_addr;
+        }
+        else
+        {
+            printf("Weird address family\n");
+            return 1;
+        }
+
+        addr = evutil_inet_ntop(ss.ss_family, inaddr, addrbuf, sizeof(addrbuf));
+        if (addr)
+        {
+            LOG_D("Listening on %s:%d\n", addr, got_port);
+            evutil_snprintf(uri_root, sizeof(uri_root), "http://%s:%d", addr, got_port);
+        }
+        else
+        {
+            printf("evutil_inet_ntop failed\n");
+            return -1;
+        }
+    }
+    event_base_dispatch(base);
+
+    return SUCCESS;
+
+}
+
+int selfcare_httpsrv_init(int argc, char **argv)
+{
+    int ret;
+    
+    ret = _httpserv_init(argc, argv);
+
+
+    return ret;
+}
+
+void selfcare_httpsrv_uninit(void)
+{
+
+}
+
+int selfcare_httpsrv_check(struct evhttp_request *req, void *arg)
+{
+	return SUCCESS;
+	
+	const char *cmdtype;
+	struct evkeyvalq *headers;
+	struct evkeyval *header;
+	struct evbuffer *buf;
+
+	switch (evhttp_request_get_command(req))
+	{
+	case EVHTTP_REQ_GET:
+		cmdtype = "GET";
+		break;
+	case EVHTTP_REQ_POST:
+		cmdtype = "POST";
+		break;
+	case EVHTTP_REQ_HEAD:
+		cmdtype = "HEAD";
+		break;
+	case EVHTTP_REQ_PUT:
+		cmdtype = "PUT";
+		break;
+	case EVHTTP_REQ_DELETE:
+		cmdtype = "DELETE";
+		break;
+	case EVHTTP_REQ_OPTIONS:
+		cmdtype = "OPTIONS";
+		break;
+	case EVHTTP_REQ_TRACE:
+		cmdtype = "TRACE";
+		break;
+	case EVHTTP_REQ_CONNECT:
+		break;
+	case EVHTTP_REQ_PATCH:
+		cmdtype = "PATCH";
+		break;
+	default:
+		cmdtype = "unknown";
+		break;
+	}
+
+	LOG_D("Received a %s request for %s\nHeader:\n", cmdtype, evhttp_request_get_uri(req));
+
+	headers = evhttp_request_get_input_headers(req);
+	for (header = headers->tqh_first; header; header = header->next.tqe_next)
+	{
+		LOG_D(" %s: %s\n", header->key, header->value);
+	}
+
+	buf = evhttp_request_get_input_buffer(req);
+	puts("Input data: <<<<");
+	while (evbuffer_get_length(buf))
+	{
+		int n;
+		char cbuf[128];
+		n = evbuffer_remove(buf, cbuf, sizeof(cbuf));
+		if (n > 0)
+		{
+			(void)fwrite(cbuf, 1, n, stdout);
+		}
+	}
+	puts(">>>");
+
+	evhttp_send_reply(req, 200, "ok", NULL);
+
+    return SUCCESS;
+}
+
+int selfcare_httpsrv_reg(const selfcare_elem_s *elem)
+{
+	memcpy(&g_elems_arr[elem->url_type], elem, sizeof(selfcare_elem_s));
+
+	return SUCCESS;
+}
+
+
+int selfcare_httpsrv_send(struct evhttp_request *req, const int ret_code, char *buf)
+{
+	struct evbuffer *evb = NULL;
+
+	evb = evbuffer_new();
+
+	evbuffer_add_printf(evb, "%s", buf);
+
+    	evhttp_add_header(evhttp_request_get_output_headers(req),
+    			"Content-Type", "application/json");
+
+	evhttp_send_reply(req, ret_code, "OK", evb);
+
+	if (evb)
+	{
+		evbuffer_free(evb);
+	}
+
+	return SUCCESS;
+}
+
+
+