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/*
 *
 * Copyright 2015 gRPC authors.
 *
 * Licensed 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 "src/core/lib/uri/uri_parser.h"

#include <string.h>

#include <grpc/grpc.h>
#include <grpc/support/log.h>

#include "src/core/lib/iomgr/exec_ctx.h"
#include "test/core/util/test_config.h"

static void test_succeeds(const char* uri_text, const char* scheme,
                          const char* authority, const char* path,
                          const char* query, const char* fragment) {
  grpc_core::ExecCtx exec_ctx;
  grpc_uri* uri = grpc_uri_parse(uri_text, 0);
  GPR_ASSERT(uri);
  GPR_ASSERT(0 == strcmp(scheme, uri->scheme));
  GPR_ASSERT(0 == strcmp(authority, uri->authority));
  GPR_ASSERT(0 == strcmp(path, uri->path));
  GPR_ASSERT(0 == strcmp(query, uri->query));
  GPR_ASSERT(0 == strcmp(fragment, uri->fragment));

  grpc_uri_destroy(uri);
}

static void test_fails(const char* uri_text) {
  grpc_core::ExecCtx exec_ctx;
  GPR_ASSERT(nullptr == grpc_uri_parse(uri_text, 0));
}

static void test_query_parts() {
  {
    grpc_core::ExecCtx exec_ctx;
    const char* uri_text = "http://foo/path?a&b=B&c=&#frag";
    grpc_uri* uri = grpc_uri_parse(uri_text, 0);
    GPR_ASSERT(uri);

    GPR_ASSERT(0 == strcmp("http", uri->scheme));
    GPR_ASSERT(0 == strcmp("foo", uri->authority));
    GPR_ASSERT(0 == strcmp("/path", uri->path));
    GPR_ASSERT(0 == strcmp("a&b=B&c=&", uri->query));
    GPR_ASSERT(4 == uri->num_query_parts);

    GPR_ASSERT(0 == strcmp("a", uri->query_parts[0]));
    GPR_ASSERT(nullptr == uri->query_parts_values[0]);

    GPR_ASSERT(0 == strcmp("b", uri->query_parts[1]));
    GPR_ASSERT(0 == strcmp("B", uri->query_parts_values[1]));

    GPR_ASSERT(0 == strcmp("c", uri->query_parts[2]));
    GPR_ASSERT(0 == strcmp("", uri->query_parts_values[2]));

    GPR_ASSERT(0 == strcmp("", uri->query_parts[3]));
    GPR_ASSERT(nullptr == uri->query_parts_values[3]);

    GPR_ASSERT(nullptr == grpc_uri_get_query_arg(uri, "a"));
    GPR_ASSERT(0 == strcmp("B", grpc_uri_get_query_arg(uri, "b")));
    GPR_ASSERT(0 == strcmp("", grpc_uri_get_query_arg(uri, "c")));
    GPR_ASSERT(nullptr == grpc_uri_get_query_arg(uri, ""));

    GPR_ASSERT(0 == strcmp("frag", uri->fragment));

    grpc_uri_destroy(uri);
  }
  {
    /* test the current behavior of multiple query part values */
    grpc_core::ExecCtx exec_ctx;
    const char* uri_text = "http://auth/path?foo=bar=baz&foobar==";
    grpc_uri* uri = grpc_uri_parse(uri_text, 0);
    GPR_ASSERT(uri);

    GPR_ASSERT(0 == strcmp("http", uri->scheme));
    GPR_ASSERT(0 == strcmp("auth", uri->authority));
    GPR_ASSERT(0 == strcmp("/path", uri->path));
    GPR_ASSERT(0 == strcmp("foo=bar=baz&foobar==", uri->query));
    GPR_ASSERT(2 == uri->num_query_parts);

    GPR_ASSERT(0 == strcmp("bar", grpc_uri_get_query_arg(uri, "foo")));
    GPR_ASSERT(0 == strcmp("", grpc_uri_get_query_arg(uri, "foobar")));

    grpc_uri_destroy(uri);
  }
  {
    /* empty query */
    grpc_core::ExecCtx exec_ctx;
    const char* uri_text = "http://foo/path";
    grpc_uri* uri = grpc_uri_parse(uri_text, 0);
    GPR_ASSERT(uri);

    GPR_ASSERT(0 == strcmp("http", uri->scheme));
    GPR_ASSERT(0 == strcmp("foo", uri->authority));
    GPR_ASSERT(0 == strcmp("/path", uri->path));
    GPR_ASSERT(0 == strcmp("", uri->query));
    GPR_ASSERT(0 == uri->num_query_parts);
    GPR_ASSERT(nullptr == uri->query_parts);
    GPR_ASSERT(nullptr == uri->query_parts_values);
    GPR_ASSERT(0 == strcmp("", uri->fragment));

    grpc_uri_destroy(uri);
  }
}

int main(int argc, char** argv) {
  grpc::testing::TestEnvironment env(argc, argv);
  grpc_init();
  test_succeeds("http://www.google.com", "http", "www.google.com", "", "", "");
  test_succeeds("dns:///foo", "dns", "", "/foo", "", "");
  test_succeeds("http://www.google.com:90", "http", "www.google.com:90", "", "",
                "");
  test_succeeds("a192.4-df:foo.coom", "a192.4-df", "", "foo.coom", "", "");
  test_succeeds("a+b:foo.coom", "a+b", "", "foo.coom", "", "");
  test_succeeds("zookeeper://127.0.0.1:2181/foo/bar", "zookeeper",
                "127.0.0.1:2181", "/foo/bar", "", "");
  test_succeeds("http://www.google.com?yay-i'm-using-queries", "http",
                "www.google.com", "", "yay-i'm-using-queries", "");
  test_succeeds("dns:foo.com#fragment-all-the-things", "dns", "", "foo.com", "",
                "fragment-all-the-things");
  test_succeeds("http:?legit", "http", "", "", "legit", "");
  test_succeeds("unix:#this-is-ok-too", "unix", "", "", "", "this-is-ok-too");
  test_succeeds("http:?legit#twice", "http", "", "", "legit", "twice");
  test_succeeds("http://foo?bar#lol?", "http", "foo", "", "bar", "lol?");
  test_succeeds("http://foo?bar#lol?/", "http", "foo", "", "bar", "lol?/");
  test_succeeds("ipv6:[2001:db8::1%252]:12345", "ipv6", "",
                "[2001:db8::1%2]:12345", "", "");

  test_fails("xyz");
  test_fails("http:?dangling-pct-%0");
  test_fails("http://foo?[bar]");
  test_fails("http://foo?x[bar]");
  test_fails("http://foo?bar#lol#");

  test_query_parts();
  grpc_shutdown();
  return 0;
}