restoring cookie of session
[src/app-framework-binder.git] / src / afb-hreq.c
index aff204d..9984cbc 100644 (file)
 #include <sys/stat.h>
 
 #include <microhttpd.h>
+#include <json.h>
 
 #if defined(USE_MAGIC_MIME_TYPE)
 #include <magic.h>
 #endif
 
-#include "local-def.h"
 #include "afb-method.h"
 #include "afb-req-itf.h"
 #include "afb-hreq.h"
@@ -51,6 +51,8 @@ static const char token_header[] = "x-afb-token";
 static const char token_arg[] = "token";
 static const char token_cookie[] = "token";
 
+static char *cookie_name = NULL;
+static char *cookie_setter = NULL;
 
 struct hreq_data {
        struct hreq_data *next;
@@ -60,19 +62,23 @@ struct hreq_data {
        char *path;
 };
 
+static struct json_object *req_json(struct afb_hreq *hreq);
 static struct afb_arg req_get(struct afb_hreq *hreq, const char *name);
-static void req_iterate(struct afb_hreq *hreq, int (*iterator)(void *closure, struct afb_arg arg), void *closure);
 static void req_fail(struct afb_hreq *hreq, const char *status, const char *info);
 static void req_success(struct afb_hreq *hreq, json_object *obj, const char *info);
+static const char *req_raw(struct afb_hreq *hreq, size_t *size);
+static void req_send(struct afb_hreq *hreq, char *buffer, size_t size);
 static int req_session_create(struct afb_hreq *hreq);
 static int req_session_check(struct afb_hreq *hreq, int refresh);
 static void req_session_close(struct afb_hreq *hreq);
 
 static const struct afb_req_itf afb_hreq_itf = {
+       .json = (void*)req_json,
        .get = (void*)req_get,
-       .iterate = (void*)req_iterate,
-       .fail = (void*)req_fail,
        .success = (void*)req_success,
+       .fail = (void*)req_fail,
+       .raw = (void*)req_raw,
+       .send = (void*)req_send,
        .session_create = (void*)req_session_create,
        .session_check = (void*)req_session_check,
        .session_close = (void*)req_session_close
@@ -81,8 +87,6 @@ static const struct afb_req_itf afb_hreq_itf = {
 static struct hreq_data *get_data(struct afb_hreq *hreq, const char *key, int create)
 {
        struct hreq_data *data = hreq->data;
-       if (key == NULL)
-               key = empty_string;
        while (data != NULL) {
                if (!strcasecmp(data->key, key))
                        return data;
@@ -147,6 +151,64 @@ static int validsubpath(const char *subpath)
 #define MAGIC_DB "/usr/share/misc/magic.mgc"
 #endif
 
+static void afb_hreq_reply_v(struct afb_hreq *hreq, unsigned status, struct MHD_Response *response, va_list args)
+{
+       char *cookie;
+       const char *k, *v;
+       k = va_arg(args, const char *);
+       while (k != NULL) {
+               v = va_arg(args, const char *);
+               MHD_add_response_header(response, k, v);
+               k = va_arg(args, const char *);
+       }
+       if (hreq->context != NULL && asprintf(&cookie, cookie_setter, hreq->context->uuid)) {
+               MHD_add_response_header(response, MHD_HTTP_HEADER_SET_COOKIE, cookie);
+               free(cookie);
+       }
+       MHD_queue_response(hreq->connection, status, response);
+       MHD_destroy_response(response);
+}
+
+void afb_hreq_reply(struct afb_hreq *hreq, unsigned status, struct MHD_Response *response, ...)
+{
+       va_list args;
+       va_start(args, response);
+       afb_hreq_reply_v(hreq, status, response, args);
+       va_end(args);
+}
+
+void afb_hreq_reply_empty(struct afb_hreq *hreq, unsigned status, ...)
+{
+       va_list args;
+       va_start(args, status);
+       afb_hreq_reply_v(hreq, status, MHD_create_response_from_buffer(0, NULL, MHD_RESPMEM_PERSISTENT), args);
+       va_end(args);
+}
+
+void afb_hreq_reply_static(struct afb_hreq *hreq, unsigned status, size_t size, char *buffer, ...)
+{
+       va_list args;
+       va_start(args, buffer);
+       afb_hreq_reply_v(hreq, status, MHD_create_response_from_buffer((unsigned)size, buffer, MHD_RESPMEM_PERSISTENT), args);
+       va_end(args);
+}
+
+void afb_hreq_reply_copy(struct afb_hreq *hreq, unsigned status, size_t size, char *buffer, ...)
+{
+       va_list args;
+       va_start(args, buffer);
+       afb_hreq_reply_v(hreq, status, MHD_create_response_from_buffer((unsigned)size, buffer, MHD_RESPMEM_MUST_COPY), args);
+       va_end(args);
+}
+
+void afb_hreq_reply_free(struct afb_hreq *hreq, unsigned status, size_t size, char *buffer, ...)
+{
+       va_list args;
+       va_start(args, buffer);
+       afb_hreq_reply_v(hreq, status, MHD_create_response_from_buffer((unsigned)size, buffer, MHD_RESPMEM_MUST_FREE), args);
+       va_end(args);
+}
+
 static magic_t lazy_libmagic()
 {
        static int done = 0;
@@ -221,11 +283,16 @@ void afb_hreq_free(struct afb_hreq *hreq)
                        MHD_destroy_post_processor(hreq->postform);
                for (data = hreq->data; data; data = hreq->data) {
                        hreq->data = data->next;
+                       if (data->path) {
+                               unlink(data->path);
+                               free(data->path);
+                       }
                        free(data->key);
                        free(data->value);
                        free(data);
                }
                ctxClientPut(hreq->context);
+               json_object_put(hreq->json);
                free(hreq);
        }
 }
@@ -259,20 +326,7 @@ int afb_hreq_valid_tail(struct afb_hreq *hreq)
 
 void afb_hreq_reply_error(struct afb_hreq *hreq, unsigned int status)
 {
-       char *buffer;
-       int length;
-       struct MHD_Response *response;
-
-       length = asprintf(&buffer, "<html><body>error %u</body></html>", status);
-       if (length > 0)
-               response = MHD_create_response_from_buffer((unsigned)length, buffer, MHD_RESPMEM_MUST_FREE);
-       else {
-               buffer = "<html><body>error</body></html>";
-               response = MHD_create_response_from_buffer(strlen(buffer), buffer, MHD_RESPMEM_PERSISTENT);
-       }
-       if (!MHD_queue_response(hreq->connection, status, response))
-               fprintf(stderr, "Failed to reply error code %u", status);
-       MHD_destroy_response(response);
+       afb_hreq_reply_empty(hreq, status, NULL);
 }
 
 int afb_hreq_reply_file_if_exist(struct afb_hreq *hreq, int dirfd, const char *filename)
@@ -312,15 +366,24 @@ int afb_hreq_reply_file_if_exist(struct afb_hreq *hreq, int dirfd, const char *f
 
        /* serve directory */
        if (S_ISDIR(st.st_mode)) {
-               if (hreq->url[hreq->lenurl - 1] != '/') {
-                       /* the redirect is needed for reliability of relative path */
-                       char *tourl = alloca(hreq->lenurl + 2);
-                       memcpy(tourl, hreq->url, hreq->lenurl);
-                       tourl[hreq->lenurl] = '/';
-                       tourl[hreq->lenurl + 1] = 0;
-                       rc = afb_hreq_redirect_to(hreq, tourl);
-               } else {
-                       rc = afb_hreq_reply_file_if_exist(hreq, fd, "index.html");
+               static const char *indexes[] = { "index.html", NULL };
+               int i = 0;
+               rc = 0;
+               while (indexes[i] != NULL) {
+                       if (faccessat(fd, indexes[i], R_OK, 0) == 0) {
+                               if (hreq->url[hreq->lenurl - 1] != '/') {
+                                       /* the redirect is needed for reliability of relative path */
+                                       char *tourl = alloca(hreq->lenurl + 2);
+                                       memcpy(tourl, hreq->url, hreq->lenurl);
+                                       tourl[hreq->lenurl] = '/';
+                                       tourl[hreq->lenurl + 1] = 0;
+                                       rc = afb_hreq_redirect_to(hreq, tourl);
+                               } else {
+                                       rc = afb_hreq_reply_file_if_exist(hreq, fd, indexes[i]);
+                               }
+                               break;
+                       }
+                       i++;
                }
                close(fd);
                return rc;
@@ -371,10 +434,10 @@ int afb_hreq_reply_file_if_exist(struct afb_hreq *hreq, int dirfd, const char *f
        }
 
        /* fills the value and send */
-       MHD_add_response_header(response, MHD_HTTP_HEADER_CACHE_CONTROL, hreq->session->cacheTimeout);
-       MHD_add_response_header(response, MHD_HTTP_HEADER_ETAG, etag);
-       MHD_queue_response(hreq->connection, status, response);
-       MHD_destroy_response(response);
+       afb_hreq_reply(hreq, status, response,
+                       MHD_HTTP_HEADER_CACHE_CONTROL, hreq->cacheTimeout,
+                       MHD_HTTP_HEADER_ETAG, etag,
+                       NULL);
        return 1;
 }
 
@@ -388,12 +451,8 @@ int afb_hreq_reply_file(struct afb_hreq *hreq, int dirfd, const char *filename)
 
 int afb_hreq_redirect_to(struct afb_hreq *hreq, const char *url)
 {
-       struct MHD_Response *response;
-
-       response = MHD_create_response_from_buffer(0, empty_string, MHD_RESPMEM_PERSISTENT);
-       MHD_add_response_header(response, MHD_HTTP_HEADER_LOCATION, url);
-       MHD_queue_response(hreq->connection, MHD_HTTP_MOVED_PERMANENTLY, response);
-       MHD_destroy_response(response);
+       afb_hreq_reply_static(hreq, MHD_HTTP_MOVED_PERMANENTLY, 0, NULL,
+                       MHD_HTTP_HEADER_LOCATION, url, NULL);
        if (verbosity)
                fprintf(stderr, "redirect from [%s] to [%s]\n", hreq->url, url);
        return 1;
@@ -438,13 +497,15 @@ static int opentempfile(char **path)
        int fd;
        char *fname;
 
-       fname = strdup("XXXXXX");
+       fname = strdup("XXXXXX"); /* TODO improve the path */
        if (fname == NULL)
                return -1;
 
-       fd = mkostemp(fname, O_CLOEXEC);
+       fd = mkostemp(fname, O_CLOEXEC|O_WRONLY);
        if (fd < 0)
                free(fname);
+       else
+               *path = fname;
        return fd;
 }
 
@@ -491,51 +552,61 @@ static struct afb_arg req_get(struct afb_hreq *hreq, const char *name)
                return (struct afb_arg){
                        .name = hdat->key,
                        .value = hdat->value,
-                       .size = hdat->length,
                        .path = hdat->path
                };
                
        return (struct afb_arg){
                .name = name,
                .value = MHD_lookup_connection_value(hreq->connection, MHD_GET_ARGUMENT_KIND, name),
-               .size = 0,
                .path = NULL
        };
 }
 
-struct iterdata
+static int _iterargs_(struct json_object *obj, enum MHD_ValueKind kind, const char *key, const char *value)
 {
-       struct afb_hreq *hreq;
-       int (*iterator)(void *closure, struct afb_arg arg);
-       void *closure;
-};
+       json_object_object_add(obj, key, value ? json_object_new_string(value) : NULL);
+       return 1;
+}
 
-static int _iterargs_(struct iterdata *id, enum MHD_ValueKind kind, const char *key, const char *value)
+static struct json_object *req_json(struct afb_hreq *hreq)
 {
-       if (get_data(id->hreq, key, 0))
-               return 1;
-       return id->iterator(id->closure, (struct afb_arg){
-               .name = key,
-               .value = value,
-               .size = 0,
-               .path = NULL
-       });
+       struct hreq_data *hdat;
+       struct json_object *obj, *val;
+
+       obj = hreq->json;
+       if (obj == NULL) {
+               hreq->json = obj = json_object_new_object();
+               if (obj == NULL) {
+               } else {
+                       MHD_get_connection_values (hreq->connection, MHD_GET_ARGUMENT_KIND, (void*)_iterargs_, obj);
+                       for (hdat = hreq->data ; hdat ; hdat = hdat->next) {
+                               if (hdat->path == NULL)
+                                       val = hdat->value ? json_object_new_string(hdat->value) : NULL;
+                               else {
+                                       val = json_object_new_object();
+                                       if (val == NULL) {
+                                       } else {
+                                               json_object_object_add(val, "file", json_object_new_string(hdat->value));
+                                               json_object_object_add(val, "path", json_object_new_string(hdat->path));
+                                       }
+                               }
+                               json_object_object_add(obj, hdat->key, val);
+                       }
+               }
+       }
+       return obj;
 }
 
-static void req_iterate(struct afb_hreq *hreq, int (*iterator)(void *closure, struct afb_arg arg), void *closure)
+static const char *req_raw(struct afb_hreq *hreq, size_t *size)
 {
-       struct iterdata id = { .hreq = hreq, .iterator = iterator, .closure = closure };
-       struct hreq_data *hdat = hreq->data;
-       while (hdat) {
-               if (!iterator(closure, (struct afb_arg){
-                       .name = hdat->key,
-                       .value = hdat->value,
-                       .size = hdat->length,
-                       .path = hdat->path}))
-                       return;
-               hdat = hdat->next;
-       }
-       MHD_get_connection_values (hreq->connection, MHD_GET_ARGUMENT_KIND, (void*)_iterargs_, &id);
+       const char *result = json_object_get_string(req_json(hreq));
+       *size = result ? strlen(result) : 0;
+       return result;
+}
+
+static void req_send(struct afb_hreq *hreq, char *buffer, size_t size)
+{
+       afb_hreq_reply_free(hreq, MHD_HTTP_OK, size, buffer, NULL);
 }
 
 static ssize_t send_json_cb(json_object *obj, uint64_t pos, char *buf, size_t max)
@@ -564,8 +635,7 @@ static void req_reply(struct afb_hreq *hreq, unsigned retcode, const char *statu
        }
 
        response = MHD_create_response_from_callback(MHD_SIZE_UNKNOWN, SIZE_RESPONSE_BUFFER, (void*)send_json_cb, root, (void*)json_object_put);
-       MHD_queue_response(hreq->connection, retcode, response);
-       MHD_destroy_response(response);
+       afb_hreq_reply(hreq, retcode, response, NULL);
 }
 
 static void req_fail(struct afb_hreq *hreq, const char *status, const char *info)
@@ -587,7 +657,7 @@ struct AFB_clientCtx *afb_hreq_context(struct afb_hreq *hreq)
                if (uuid == NULL)
                        uuid = afb_hreq_get_argument(hreq, uuid_arg);
                if (uuid == NULL)
-                       uuid = afb_hreq_get_cookie(hreq, uuid_cookie);
+                       uuid = afb_hreq_get_cookie(hreq, cookie_name);
                hreq->context = ctxClientGetForUuid(uuid);
        }
        return hreq->context;
@@ -637,5 +707,24 @@ static void req_session_close(struct afb_hreq *hreq)
                ctxClientClose(context);
 }
 
+int afb_hreq_init_cookie(int port, const char *path, int maxage)
+{
+       int rc;
+
+       free(cookie_name);
+       free(cookie_setter);
+       cookie_name = NULL;
+       cookie_setter = NULL;
+
+       path = path ? : "/";
+       rc = asprintf(&cookie_name, "x-afb-uuid-%d", port);
+       if (rc < 0)
+               return 0;
+       rc = asprintf(&cookie_setter, "%s=%%s; Path=%s; Max-Age=%d; HttpOnly",
+                       cookie_name, path, maxage);
+       if (rc < 0)
+               return 0;
+       return 1;
+}