/* ====================================================================

 *    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 <stdlib.h>

#include <apr.h>

#include <apr_uri.h>

#include <apr_strings.h>

#include <apr_atomic.h>

#include <apr_base64.h>

#include <apr_getopt.h>

#include <apr_version.h>

#include "serf.h"

typedef struct {

    int count;

    int using_ssl;

    serf_ssl_context_t *ssl_ctx;

    serf_bucket_alloc_t *bkt_alloc;

} app_baton_t;

typedef struct {

#if APR_MAJOR_VERSION > 0

    apr_uint32_t requests_outstanding;

#else

    apr_atomic_t requests_outstanding;

#endif

    int print_headers;

    serf_response_acceptor_t acceptor;

    app_baton_t *acceptor_baton;

    serf_response_handler_t handler;

    const char *host;

    const char *method;

    const char *path;

    const char *req_body_path;

    const char *authn;

} handler_baton_t;

/* Kludges for APR 0.9 support. */

#if APR_MAJOR_VERSION == 0

#define apr_atomic_inc32 apr_atomic_inc

#define apr_atomic_dec32 apr_atomic_dec

#define apr_atomic_read32 apr_atomic_read

#endif

static void closed_connection(serf_connection_t *conn,

                              void *closed_baton,

                              apr_status_t why,

                              apr_pool_t *pool)

{

    if (why) {

        abort();

    }

}

static apr_status_t ignore_all_cert_errors(void *data, int failures,

                                           const serf_ssl_certificate_t *cert)

{

    /* In a real application, you would normally would not want to do this */

    return APR_SUCCESS;

}

static apr_status_t conn_setup(apr_socket_t *skt,

                                serf_bucket_t **input_bkt,

                                serf_bucket_t **output_bkt,

                                void *setup_baton,

                                apr_pool_t *pool)

{

    serf_bucket_t *c;

    app_baton_t *ctx = setup_baton;

    c = serf_bucket_socket_create(skt, ctx->bkt_alloc);

    if (ctx->using_ssl) {

        c = serf_bucket_ssl_decrypt_create(c, ctx->ssl_ctx, ctx->bkt_alloc);

        if (!ctx->ssl_ctx) {

            ctx->ssl_ctx = serf_bucket_ssl_decrypt_context_get(c);

        }

        serf_ssl_server_cert_callback_set(ctx->ssl_ctx, ignore_all_cert_errors, NULL);

        *output_bkt = serf_bucket_ssl_encrypt_create(*output_bkt, ctx->ssl_ctx,

                                                    ctx->bkt_alloc);

    }

    *input_bkt = c;

    return APR_SUCCESS;

}

static serf_bucket_t* accept_response(serf_request_t *request,

                                      serf_bucket_t *stream,

                                      void *acceptor_baton,

                                      apr_pool_t *pool)

{

    serf_bucket_t *c;

    serf_bucket_alloc_t *bkt_alloc;

    /* get the per-request bucket allocator */

    bkt_alloc = serf_request_get_alloc(request);

    /* Create a barrier so the response doesn't eat us! */

    c = serf_bucket_barrier_create(stream, bkt_alloc);

    return serf_bucket_response_create(c, bkt_alloc);

}

static serf_bucket_t* accept_bwtp(serf_request_t *request,

                                  serf_bucket_t *stream,

                                  void *acceptor_baton,

                                  apr_pool_t *pool)

{

    serf_bucket_t *c;

    app_baton_t *app_ctx = acceptor_baton;

    /* Create a barrier so the response doesn't eat us! */

    c = serf_bucket_barrier_create(stream, app_ctx->bkt_alloc);

    return serf_bucket_bwtp_incoming_frame_create(c, app_ctx->bkt_alloc);

}

/* fwd declare */

static apr_status_t handle_bwtp_upgrade(serf_request_t *request,

                                        serf_bucket_t *response,

                                        void *handler_baton,

                                        apr_pool_t *pool);

static apr_status_t setup_request(serf_request_t *request,

                                  void *setup_baton,

                                  serf_bucket_t **req_bkt,

                                  serf_response_acceptor_t *acceptor,

                                  void **acceptor_baton,

                                  serf_response_handler_t *handler,

                                  void **handler_baton,

                                  apr_pool_t *pool)

{

    handler_baton_t *ctx = setup_baton;

    serf_bucket_t *hdrs_bkt;

    serf_bucket_t *body_bkt;

    if (ctx->req_body_path) {

        apr_file_t *file;

        apr_status_t status;

        status = apr_file_open(&file, ctx->req_body_path, APR_READ,

                               APR_OS_DEFAULT, pool);

        if (status) {

            printf("Error opening file (%s)\n", ctx->req_body_path);

            return status;

        }

        body_bkt = serf_bucket_file_create(file,

                                           serf_request_get_alloc(request));

    }

    else {

        body_bkt = NULL;

    }

    /*

    *req_bkt = serf_bucket_bwtp_message_create(0, body_bkt,

                                               serf_request_get_alloc(request));

    */

    *req_bkt = serf_bucket_bwtp_header_create(0, "MESSAGE",

                                              serf_request_get_alloc(request));

    hdrs_bkt = serf_bucket_bwtp_frame_get_headers(*req_bkt);

    /* FIXME: Shouldn't we be able to figure out the host ourselves? */

    serf_bucket_headers_setn(hdrs_bkt, "Host", ctx->host);

    serf_bucket_headers_setn(hdrs_bkt, "User-Agent",

                             "Serf/" SERF_VERSION_STRING);

    /* Shouldn't serf do this for us? */

    serf_bucket_headers_setn(hdrs_bkt, "Accept-Encoding", "gzip");

    if (ctx->authn != NULL) {

        serf_bucket_headers_setn(hdrs_bkt, "Authorization", ctx->authn);

    }

    *acceptor = ctx->acceptor;

    *acceptor_baton = ctx->acceptor_baton;

    *handler = ctx->handler;

    *handler_baton = ctx;

    return APR_SUCCESS;

}

static apr_status_t setup_bwtp_upgrade(serf_request_t *request,

                                       void *setup_baton,

                                       serf_bucket_t **req_bkt,

                                       serf_response_acceptor_t *acceptor,

                                       void **acceptor_baton,

                                       serf_response_handler_t *handler,

                                       void **handler_baton,

                                       apr_pool_t *pool)

{

    serf_bucket_t *hdrs_bkt;

    handler_baton_t *ctx = setup_baton;

    *req_bkt = serf_bucket_request_create("OPTIONS", "*", NULL,

                                          serf_request_get_alloc(request));

    hdrs_bkt = serf_bucket_request_get_headers(*req_bkt);

    serf_bucket_headers_setn(hdrs_bkt, "Upgrade", "BWTP/1.0");

    serf_bucket_headers_setn(hdrs_bkt, "Connection", "Upgrade");

    *acceptor = ctx->acceptor;

    *acceptor_baton = ctx->acceptor_baton;

    *handler = handle_bwtp_upgrade;

    *handler_baton = ctx;

    return APR_SUCCESS;

}

static apr_status_t setup_channel(serf_request_t *request,

                                  void *setup_baton,

                                  serf_bucket_t **req_bkt,

                                  serf_response_acceptor_t *acceptor,

                                  void **acceptor_baton,

                                  serf_response_handler_t *handler,

                                  void **handler_baton,

                                  apr_pool_t *pool)

{

    handler_baton_t *ctx = setup_baton;

    serf_bucket_t *hdrs_bkt;

    *req_bkt = serf_bucket_bwtp_channel_open(0, ctx->path,

                                             serf_request_get_alloc(request));

    hdrs_bkt = serf_bucket_bwtp_frame_get_headers(*req_bkt);

    /* FIXME: Shouldn't we be able to figure out the host ourselves? */

    serf_bucket_headers_setn(hdrs_bkt, "Host", ctx->host);

    serf_bucket_headers_setn(hdrs_bkt, "User-Agent",

                             "Serf/" SERF_VERSION_STRING);

    /* Shouldn't serf do this for us? */

    serf_bucket_headers_setn(hdrs_bkt, "Accept-Encoding", "gzip");

    if (ctx->authn != NULL) {

        serf_bucket_headers_setn(hdrs_bkt, "Authorization", ctx->authn);

    }

    *acceptor = ctx->acceptor;

    *acceptor_baton = ctx->acceptor_baton;

    *handler = ctx->handler;

    *handler_baton = ctx;

    return APR_SUCCESS;

}

static apr_status_t setup_close(serf_request_t *request,

                                void *setup_baton,

                                serf_bucket_t **req_bkt,

                                serf_response_acceptor_t *acceptor,

                                void **acceptor_baton,

                                serf_response_handler_t *handler,

                                void **handler_baton,

                                apr_pool_t *pool)

{

    handler_baton_t *ctx = setup_baton;

    *req_bkt = serf_bucket_bwtp_channel_close(0, serf_request_get_alloc(request));

    *acceptor = ctx->acceptor;

    *acceptor_baton = ctx->acceptor_baton;

    *handler = ctx->handler;

    *handler_baton = ctx;

    return APR_SUCCESS;

}

static apr_status_t handle_bwtp(serf_request_t *request,

                                serf_bucket_t *response,

                                void *handler_baton,

                                apr_pool_t *pool)

{

    const char *data;

    apr_size_t len;

    apr_status_t status;

    if (!response) {

        /* A NULL response can come back if the request failed completely */

        return APR_EGENERAL;

    }

    status = serf_bucket_bwtp_incoming_frame_wait_for_headers(response);

    if (SERF_BUCKET_READ_ERROR(status) || APR_STATUS_IS_EAGAIN(status)) {

        return status;

    }

    printf("BWTP %p frame: %d %d %s\n",

           response, serf_bucket_bwtp_frame_get_channel(response),

           serf_bucket_bwtp_frame_get_type(response),

           serf_bucket_bwtp_frame_get_phrase(response));

    while (1) {

        status = serf_bucket_read(response, 2048, &data, &len;;

        if (SERF_BUCKET_READ_ERROR(status))

            return status;

        /* got some data. print it out. */

        if (len) {

            puts("BWTP body:\n---");

            fwrite(data, 1, len, stdout);

            puts("\n---");

        }

        /* are we done yet? */

        if (APR_STATUS_IS_EOF(status)) {

            return APR_EOF;

        }

        /* have we drained the response so far? */

        if (APR_STATUS_IS_EAGAIN(status))

            return status;

        /* loop to read some more. */

    }

    /* NOTREACHED */

}

static apr_status_t handle_bwtp_upgrade(serf_request_t *request,

                                        serf_bucket_t *response,

                                        void *handler_baton,

                                        apr_pool_t *pool)

{

    const char *data;

    apr_size_t len;

    serf_status_line sl;

    apr_status_t status;

    handler_baton_t *ctx = handler_baton;

    if (!response) {

        /* A NULL response can come back if the request failed completely */

        return APR_EGENERAL;

    }

    status = serf_bucket_response_status(response, &sl);

    if (status) {

        return status;

    }

    while (1) {

        status = serf_bucket_read(response, 2048, &data, &len;;

        if (SERF_BUCKET_READ_ERROR(status))

            return status;

        /* got some data. print it out. */

        fwrite(data, 1, len, stdout);

        /* are we done yet? */

        if (APR_STATUS_IS_EOF(status)) {

            int i;

            serf_connection_t *conn;

            serf_request_t *new_req;

            conn = serf_request_get_conn(request);

            serf_connection_set_async_responses(conn,

                accept_bwtp, ctx->acceptor_baton, handle_bwtp, NULL);

            new_req = serf_connection_request_create(conn, setup_channel, ctx);

            for (i = 0; i < ctx->acceptor_baton->count; i++) {

                new_req = serf_connection_request_create(conn,

                                                         setup_request,

                                                         ctx);

            }

            return APR_EOF;

        }

        /* have we drained the response so far? */

        if (APR_STATUS_IS_EAGAIN(status))

            return status;

        /* loop to read some more. */

    }

    /* NOTREACHED */

}

static apr_status_t handle_response(serf_request_t *request,

                                    serf_bucket_t *response,

                                    void *handler_baton,

                                    apr_pool_t *pool)

{

    const char *data;

    apr_size_t len;

    serf_status_line sl;

    apr_status_t status;

    handler_baton_t *ctx = handler_baton;

    if (!response) {

        /* A NULL response can come back if the request failed completely */

        return APR_EGENERAL;

    }

    status = serf_bucket_response_status(response, &sl);

    if (status) {

        return status;

    }

    while (1) {

        status = serf_bucket_read(response, 2048, &data, &len;;

        if (SERF_BUCKET_READ_ERROR(status))

            return status;

        /* got some data. print it out. */

        fwrite(data, 1, len, stdout);

        /* are we done yet? */

        if (APR_STATUS_IS_EOF(status)) {

            if (ctx->print_headers) {

                serf_bucket_t *hdrs;

                hdrs = serf_bucket_response_get_headers(response);

                while (1) {

                    status = serf_bucket_read(hdrs, 2048, &data, &len;;

                    if (SERF_BUCKET_READ_ERROR(status))

                        return status;

                    fwrite(data, 1, len, stdout);

                    if (APR_STATUS_IS_EOF(status)) {

                        break;

                    }

                }

            }

            apr_atomic_dec32(&ctx->requests_outstanding);

            if (!ctx->requests_outstanding) {

                serf_connection_t *conn;

                serf_request_t *new_req;

                conn = serf_request_get_conn(request);

                new_req =

                    serf_connection_request_create(conn, setup_close, ctx);

            }

            return APR_EOF;

        }

        /* have we drained the response so far? */

        if (APR_STATUS_IS_EAGAIN(status))

            return status;

        /* loop to read some more. */

    }

    /* NOTREACHED */

}

static void print_usage(apr_pool_t *pool)

{

    puts("serf_get [options] URL");

    puts("-h\tDisplay this help");

    puts("-v\tDisplay version");

    puts("-H\tPrint response headers");

    puts("-n <count> Fetch URL <count> times");

    puts("-a <user:password> Present Basic authentication credentials");

    puts("-m <method> Use the <method> HTTP Method");

    puts("-f <file> Use the <file> as the request body");

}

int main(int argc, const char **argv)

{

    apr_status_t status;

    apr_pool_t *pool;

    apr_sockaddr_t *address;

    serf_context_t *context;

    serf_connection_t *connection;

    serf_request_t *request;

    app_baton_t app_ctx;

    handler_baton_t handler_ctx;

    apr_uri_t url;

    const char *raw_url, *method, *req_body_path = NULL;

    int i;

    int print_headers;

    char *authn = NULL;

    apr_getopt_t *opt;

    char opt_c;

    const char *opt_arg;

    apr_initialize();

    atexit(apr_terminate);

    apr_pool_create(&pool, NULL);

    /* serf_initialize(); */

    /* Default to one round of fetching. */

    app_ctx.count = 1;

    /* Default to GET. */

    method = "GET";

    /* Do not print headers by default. */

    print_headers = 0;

    apr_getopt_init(&opt, pool, argc, argv);

    while ((status = apr_getopt(opt, "a:f:hHm:n:v", &opt_c, &opt_arg)) ==

           APR_SUCCESS) {

        int srclen, enclen;

        switch (opt_c) {

        case 'a':

            srclen = strlen(opt_arg);

            enclen = apr_base64_encode_len(srclen);

            authn = apr_palloc(pool, enclen + 6);

            strcpy(authn, "Basic ");

            (void) apr_base64_encode(&authn[6], opt_arg, srclen);

            break;

        case 'f':

            req_body_path = opt_arg;

            break;

        case 'h':

            print_usage(pool);

            exit(0);

            break;

        case 'H':

            print_headers = 1;

            break;

        case 'm':

            method = opt_arg;

            break;

        case 'n':

            errno = 0;

            app_ctx.count = apr_strtoi64(opt_arg, NULL, 10);

            if (errno) {

                printf("Problem converting number of times to fetch URL (%d)\n",

                       errno);

                return errno;

            }

            break;

        case 'v':

            puts("Serf version: " SERF_VERSION_STRING);

            exit(0);

        default:

            break;

        }

    }

    if (opt->ind != opt->argc - 1) {

        print_usage(pool);

        exit(-1);

    }

    raw_url = argv[opt->ind];

    apr_uri_parse(pool, raw_url, &url;;

    if (!url.port) {

        url.port = apr_uri_port_of_scheme(url.scheme);

    }

    if (!url.path) {

        url.path = "/";

    }

    if (strcasecmp(url.scheme, "https") == 0) {

        app_ctx.using_ssl = 1;

    }

    else {

        app_ctx.using_ssl = 0;

    }

    status = apr_sockaddr_info_get(&address,

                                   url.hostname, APR_UNSPEC, url.port, 0,

                                   pool);

    if (status) {

        printf("Error creating address: %d\n", status);

        apr_pool_destroy(pool);

        exit(1);

    }

    context = serf_context_create(pool);

    /* ### Connection or Context should have an allocator? */

    app_ctx.bkt_alloc = serf_bucket_allocator_create(pool, NULL, NULL);

    app_ctx.ssl_ctx = NULL;

    connection = serf_connection_create(context, address,

                                        conn_setup, &app_ctx,

                                        closed_connection, &app_ctx,

                                        pool);

    handler_ctx.requests_outstanding = 0;

    handler_ctx.print_headers = print_headers;

    handler_ctx.host = url.hostinfo;

    handler_ctx.method = method;

    handler_ctx.path = url.path;

    handler_ctx.authn = authn;

    handler_ctx.req_body_path = req_body_path;

    handler_ctx.acceptor = accept_response;

    handler_ctx.acceptor_baton = &app_ctx;

    handler_ctx.handler = handle_response;

    request = serf_connection_request_create(connection, setup_bwtp_upgrade,

                                             &handler_ctx);

    for (i = 0; i < app_ctx.count; i++) {

        apr_atomic_inc32(&handler_ctx.requests_outstanding);

    }

    while (1) {

        status = serf_context_run(context, SERF_DURATION_FOREVER, pool);

        if (APR_STATUS_IS_TIMEUP(status))

            continue;

        if (status) {

            char buf[200];

            printf("Error running context: (%d) %s\n", status,

                   apr_strerror(status, buf, sizeof(buf)));

            apr_pool_destroy(pool);

            exit(1);

        }

        if (!apr_atomic_read32(&handler_ctx.requests_outstanding)) {

            break;

        }

        /* Debugging purposes only! */

        serf_debug__closed_conn(app_ctx.bkt_alloc);

    }

    serf_connection_close(connection);

    apr_pool_destroy(pool);

    return 0;

}