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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/GenericLexer.h>
#include <AK/LexicalPath.h>
#include <AK/NumberFormat.h>
#include <AK/SharedBuffer.h>
#include <AK/URL.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/EventLoop.h>
#include <LibCore/File.h>
#include <LibProtocol/Client.h>
#include <LibProtocol/Download.h>
#include <ctype.h>
#include <stdio.h>
// FIXME: Move this somewhere else when it's needed (e.g. in the Browser)
class ContentDispositionParser {
public:
ContentDispositionParser(const StringView& value)
{
GenericLexer lexer(value);
lexer.ignore_while(isspace);
if (lexer.consume_specific("inline")) {
m_kind = Kind::Inline;
if (!lexer.is_eof())
m_might_be_wrong = true;
return;
}
if (lexer.consume_specific("attachment")) {
m_kind = Kind::Attachment;
if (lexer.consume_specific(";")) {
lexer.ignore_while(isspace);
if (lexer.consume_specific("filename=")) {
// RFC 2183: "A short (length <= 78 characters)
// parameter value containing only non-`tspecials' characters SHOULD be
// represented as a single `token'."
// Some people seem to take this as generic advice of "if it doesn't have special characters,
// it's safe to specify as a single token"
// So let's just be as lenient as possible.
if (lexer.next_is('"'))
m_filename = lexer.consume_quoted_string();
else
m_filename = lexer.consume_until(is_any_of("()<>@,;:\\\"/[]?= "));
} else {
m_might_be_wrong = true;
}
}
return;
}
if (lexer.consume_specific("form-data")) {
m_kind = Kind::FormData;
while (lexer.consume_specific(";")) {
lexer.ignore_while(isspace);
if (lexer.consume_specific("name=")) {
m_name = lexer.consume_quoted_string();
} else if (lexer.consume_specific("filename=")) {
if (lexer.next_is('"'))
m_filename = lexer.consume_quoted_string();
else
m_filename = lexer.consume_until(is_any_of("()<>@,;:\\\"/[]?= "));
} else {
m_might_be_wrong = true;
}
}
return;
}
// FIXME: Support 'filename*'
m_might_be_wrong = true;
}
enum class Kind {
Inline,
Attachment,
FormData,
};
const StringView& filename() const { return m_filename; }
const StringView& name() const { return m_name; }
Kind kind() const { return m_kind; }
bool might_be_wrong() const { return m_might_be_wrong; }
private:
StringView m_filename;
StringView m_name;
Kind m_kind { Kind::Inline };
bool m_might_be_wrong { false };
};
static void do_write(const ByteBuffer& payload)
{
size_t length_remaining = payload.size();
size_t length_written = 0;
while (length_remaining > 0) {
auto nwritten = fwrite(payload.offset_pointer(length_written), sizeof(char), length_remaining, stdout);
if (nwritten > 0) {
length_remaining -= nwritten;
length_written += nwritten;
continue;
}
if (feof(stdout)) {
fprintf(stderr, "pro: unexpected eof while writing\n");
return;
}
if (ferror(stdout)) {
fprintf(stderr, "pro: error while writing\n");
return;
}
}
}
int main(int argc, char** argv)
{
const char* url_str = nullptr;
bool save_at_provided_name = false;
Core::ArgsParser args_parser;
args_parser.add_option(save_at_provided_name, "Write to a file named as the remote file", nullptr, 'O');
args_parser.add_positional_argument(url_str, "URL to download from", "url");
args_parser.parse(argc, argv);
URL url(url_str);
if (!url.is_valid()) {
fprintf(stderr, "'%s' is not a valid URL\n", url_str);
return 1;
}
Core::EventLoop loop;
auto protocol_client = Protocol::Client::construct();
auto download = protocol_client->start_download("GET", url.to_string());
if (!download) {
fprintf(stderr, "Failed to start download for '%s'\n", url_str);
return 1;
}
u32 previous_downloaded_size { 0 };
timeval prev_time, current_time, time_diff;
gettimeofday(&prev_time, nullptr);
download->on_progress = [&](Optional<u32> maybe_total_size, u32 downloaded_size) {
fprintf(stderr, "\r\033[2K");
if (maybe_total_size.has_value()) {
fprintf(stderr, "\033]9;%d;%d;\033\\", downloaded_size, maybe_total_size.value());
fprintf(stderr, "Download progress: %s / %s", human_readable_size(downloaded_size).characters(), human_readable_size(maybe_total_size.value()).characters());
} else {
fprintf(stderr, "Download progress: %s / ???", human_readable_size(downloaded_size).characters());
}
gettimeofday(¤t_time, nullptr);
timersub(¤t_time, &prev_time, &time_diff);
auto time_diff_ms = time_diff.tv_sec * 1000 + time_diff.tv_usec / 1000;
auto size_diff = downloaded_size - previous_downloaded_size;
fprintf(stderr, " at %s/s", human_readable_size(((float)size_diff / (float)time_diff_ms) * 1000).characters());
previous_downloaded_size = downloaded_size;
prev_time = current_time;
};
download->on_finish = [&](bool success, auto& payload, auto, auto& response_headers, auto) {
fprintf(stderr, "\033]9;-1;\033\\");
fprintf(stderr, "\n");
if (success && save_at_provided_name) {
String output_name;
if (auto content_disposition = response_headers.get("Content-Disposition"); content_disposition.has_value()) {
auto& value = content_disposition.value();
ContentDispositionParser parser(value);
output_name = parser.filename();
}
if (output_name.is_empty())
output_name = url.path();
LexicalPath path { output_name };
output_name = path.basename();
// The URL didn't have a name component, e.g. 'serenityos.org'
if (output_name.is_empty() || output_name == "/") {
int i = -1;
do {
output_name = url.host();
if (i > -1)
output_name = String::format("%s.%d", output_name.characters(), i);
++i;
} while (Core::File::exists(output_name));
}
if (freopen(output_name.characters(), "w", stdout) == nullptr) {
perror("freopen");
success = false; // oops!
loop.quit(1);
}
}
if (success)
do_write(payload);
else
fprintf(stderr, "Download failed :(\n");
loop.quit(0);
};
dbgprintf("started download with id %d\n", download->id());
return loop.exec();
}
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