| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| #include "url.h" |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| /** |
| * Returns whether the given character is a character that need not be |
| * escaped when included as part of a component of a URL. |
| * |
| * @param c |
| * The character to test. |
| * |
| * @return |
| * Zero if the character does not need to be escaped when included as |
| * part of a component of a URL, non-zero otherwise. |
| */ |
| static int guac_kubernetes_is_url_safe(char c) { |
| return (c >= 'A' && c <= 'Z') |
| || (c >= 'a' && c <= 'z') |
| || (c >= '0' && c <= '9') |
| || strchr("-_.!~*'()", c) != NULL; |
| } |
| |
| int guac_kubernetes_escape_url_component(char* output, int length, |
| const char* str) { |
| |
| char* current = output; |
| while (*str != '\0') { |
| |
| char c = *str; |
| |
| /* Store alphanumeric characters verbatim */ |
| if (guac_kubernetes_is_url_safe(c)) { |
| |
| /* Verify space exists for single character */ |
| if (length < 1) |
| return 1; |
| |
| *(current++) = c; |
| length--; |
| |
| } |
| |
| /* Escape EVERYTHING else as hex */ |
| else { |
| |
| /* Verify space exists for hex-encoded character */ |
| if (length < 4) |
| return 1; |
| |
| snprintf(current, 4, "%%%02X", (int) c); |
| |
| current += 3; |
| length -= 3; |
| } |
| |
| /* Next character */ |
| str++; |
| |
| } |
| |
| /* Verify space exists for null terminator */ |
| if (length < 1) |
| return 1; |
| |
| /* Append null terminator */ |
| *current = '\0'; |
| return 0; |
| |
| } |
| |
| int guac_kubernetes_endpoint_attach(char* buffer, int length, |
| const char* kubernetes_namespace, const char* kubernetes_pod, |
| const char* kubernetes_container) { |
| |
| int written; |
| |
| char escaped_namespace[GUAC_KUBERNETES_MAX_ENDPOINT_LENGTH]; |
| char escaped_pod[GUAC_KUBERNETES_MAX_ENDPOINT_LENGTH]; |
| char escaped_container[GUAC_KUBERNETES_MAX_ENDPOINT_LENGTH]; |
| |
| /* Escape Kubernetes namespace */ |
| if (guac_kubernetes_escape_url_component(escaped_namespace, |
| sizeof(escaped_namespace), kubernetes_namespace)) |
| return 1; |
| |
| /* Escape name of Kubernetes pod */ |
| if (guac_kubernetes_escape_url_component(escaped_pod, |
| sizeof(escaped_pod), kubernetes_pod)) |
| return 1; |
| |
| /* Generate attachment endpoint URL */ |
| if (kubernetes_container != NULL) { |
| |
| /* Escape container name */ |
| if (guac_kubernetes_escape_url_component(escaped_container, |
| sizeof(escaped_container), kubernetes_container)) |
| return 1; |
| |
| written = snprintf(buffer, length, |
| "/api/v1/namespaces/%s/pods/%s/attach" |
| "?container=%s&stdin=true&stdout=true&tty=true", |
| escaped_namespace, escaped_pod, escaped_container); |
| } |
| else { |
| written = snprintf(buffer, length, |
| "/api/v1/namespaces/%s/pods/%s/attach" |
| "?stdin=true&stdout=true&tty=true", |
| escaped_namespace, escaped_pod); |
| } |
| |
| /* Endpoint URL was successfully generated if it was written to the given |
| * buffer without truncation */ |
| return !(written < length - 1); |
| |
| } |
| |