mirror of
https://github.com/RubyMetric/chsrc.git
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296 lines
7.2 KiB
C
296 lines
7.2 KiB
C
/** ------------------------------------------------------------
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* File : chsrc.h
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* License : GPLv3
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* Authors : Aoran Zeng <ccmywish@qq.com>
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* Created on : <2023-08-29>
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* Last modified : <2023-09-21>
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*
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* chsrc:
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*
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* chsrc.c 头文件
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* ------------------------------------------------------------*/
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#include "xy.h"
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#include "sources.h"
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/**
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* 检测二进制程序是否存在
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*
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* @param check_cmd 检测 `progname` 是否存在的一段命令，一般来说，填 `progname` 本身即可，
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* 但是某些情况下，需要使用其他命令绕过一些特殊情况，比如 python 这个命令在Windows上
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* 会自动打开 Microsoft Store，需避免
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*
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* @param progname 要检测的二进制程序名
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*/
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bool
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does_the_program_exist (char* check_cmd, char* progname)
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{
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char* which = check_cmd;
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int ret = system(which);
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// char buf[32] = {0}; sprintf(buf, "错误码: %d", ret);
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if (0!=ret) {
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// xy_warn (xy_strjoin(4, "× 命令 ", progname, " 不存在，", buf));
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xy_warn (xy_strjoin(3, "× 命令 ", progname, " 不存在"));
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return false;
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} else {
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xy_success (xy_strjoin(3, "√ 命令 ", progname, " 存在"));
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return true;
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}
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}
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/**
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* 用于 _setsrc 函数，检测用户输入的镜像站code，是否存在于该target可用源中
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*
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* @param target 目标名
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* @param input 如果用户输入 default 或者 def，则选择第一个源
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*/
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#define lets_find_mirror(s, input) does_the_input_mirror_exist(s##_sources, s##_sources_n, (char*)#s+3, input)
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int
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does_the_input_mirror_exist (source_info* sources, size_t size, char* target, char* input)
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{
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if (0==size) {
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xy_error(xy_strjoin(3, "chsrc: 当前 ", target, " 无任何可用源，请联系维护者"));
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exit(1);
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}
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if (1==size) {
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xy_success(xy_strjoin(5, "chsrc: ", sources[0].mirror->name, " 是 ", target, " 目前唯一可用镜像站，感谢你们的慷慨支持"));
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}
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if (xy_streql("default", input) || xy_streql("def", input)) {
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xy_info ("chsrc: 默认使用维护团队测速第一的源");
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return 0;
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}
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int idx = 0;
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source_info source = sources[0];
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bool exist = false;
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for (int i=0; i<size; i++)
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{
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source = sources[i];
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if (xy_streql(source.mirror->code, input)) {
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idx = i;
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exist = true;
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break;
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}
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}
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if (!exist) {
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xy_error (xy_strjoin(3, "chsrc: 镜像站 ", input, " 不存在"));
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xy_error (xy_2strjoin("chsrc: 查看可使用源，请使用 chsrc list ", target));
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exit(1);
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}
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return idx;
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}
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/**
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* 该函数来自 oh-my-mirrorz.py，由我(@ccmywish)翻译为C语言，但功劳和版权属于原作者
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*/
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char*
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to_human_readable_speed (double speed)
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{
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char* scale[] = {"Byte/s", "KByte/s", "MByte/s", "GByte/s", "TByte/s"};
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int i = 0;
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while (speed > 1024.0)
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{
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i += 1;
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speed /= 1024.0;
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}
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char* buf = xy_malloc0(64);
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sprintf(buf, "%.2f %s", speed, scale[i]);
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char* new = NULL;
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if (i <= 1 ) new = xy_str_to_red(buf);
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else
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{
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if (i == 2 && speed < 2.00) new = xy_str_to_yellow(buf);
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else new = xy_str_to_green(buf);
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}
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return new;
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}
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/**
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* 测速代码参考自 https://github.com/mirrorz-org/oh-my-mirrorz/blob/master/oh-my-mirrorz.py
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* 功劳和版权属于原作者，由我(@ccmywish)修改为C语言，并做了额外调整。
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*
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* @return 返回测得的速度，若出错，返回-1
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*/
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double
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test_speed_url (const char* url)
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{
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char* time_sec = "6";
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/* 现在我们切换至跳转后的链接来测速，不再使用下述判断
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if (xy_str_start_with(url, "https://registry.npmmirror"))
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{
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// 这里 npmmirror 跳转非常慢，需要1~3秒，所以我们给它留够至少8秒测速时间，否则非常不准
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time_sec = "10";
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}
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*/
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// 我们用 —L，因为Ruby China源会跳转到其他地方
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// npmmirror 也会跳转
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char* curl_cmd = xy_strjoin(6, "curl -qsL -o ", xy_os_devnull,
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" -w \"%{http_code} %{speed_download}\" -m", time_sec ,
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" -A chsrc/" Chsrc_Version " ", url);
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// xy_info (xy_2strjoin("chsrc: 测速 ", url));
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FILE* fp = popen(curl_cmd, "r");
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char buf[64] = {0};
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while(NULL!=fgets(buf, 64, fp));
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// puts(buf);
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// 如果尾部有换行，删除
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char* last_lf = strrchr(buf, '\n');
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if (last_lf) *last_lf = '\0';
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char* split = strchr(buf, ' ');
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if (split) *split = '\0';
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// puts(buf); puts(split+1);
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int http_code = atoi(buf);
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double speed = atof(split+1);
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char* speedstr = to_human_readable_speed(speed);
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if (200!=http_code) {
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char* httpcodestr = xy_str_to_yellow(xy_2strjoin("HTTP码 ", buf));
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puts (xy_strjoin(3, speedstr, " | ", httpcodestr));
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} else {
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puts (speedstr);
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}
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return speed;
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}
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int
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dblary_maxidx_(double* array, int size)
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{
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double maxval = array[0];
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int maxidx = 0;
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for (int i=1; i<size; i++) {
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if (array[i]>maxval) {
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maxval = array[i];
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maxidx = i;
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}
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}
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return maxidx;
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}
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#define lets_test_speed(s) lets_test_speed_(s##_sources, s##_sources_n, (char*)#s+3)
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int
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lets_test_speed_ (source_info* sources, size_t size, const char* target)
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{
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if (0==size) {
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xy_error(xy_strjoin(3, "chsrc: 当前 ", target, " 无任何可用源，请联系维护者"));
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exit(1);
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}
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bool onlyone = false;
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if (1==size) onlyone = true;
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double speeds[size];
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double speed = 0.0;
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for (int i=0;i<size;i++)
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{
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source_info src = sources[i];
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const char* url = src.mirror->__bigfile_url;
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if (NULL==url) {
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xy_warn ("chsrc: 跳过该站点");
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speed = 0;
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} else {
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printf ("%s",xy_strjoin(3, "chsrc: 测速 ", src.mirror->site , " ... "));
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fflush(stdout);
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speed = test_speed_url (url);
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}
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speeds[i] = speed;
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}
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int fastidx = dblary_maxidx_ (speeds, size);
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if (onlyone)
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xy_success(xy_strjoin(5, "chsrc: ", sources[fastidx].mirror->name, " 是 ", target, " 目前唯一可用镜像站，感谢你们的慷慨支持"));
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else
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xy_success (xy_2strjoin("chsrc: 最快镜像站: ", sources[fastidx].mirror->name));
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return fastidx;
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}
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/**
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* 用于告知用户 chsrc 所执行的操作
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*/
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void
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chsrc_logcmd (const char* cmd)
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{
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xy_info(xy_2strjoin("chsrc: 运行 ", cmd));
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}
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void
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chsrc_runcmd (const char* cmd)
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{
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chsrc_logcmd(cmd);
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system(cmd);
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}
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/**
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* 用于 _setsrc 函数
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*/
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void
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chsrc_say_selection (source_info* source)
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{
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xy_info (xy_strjoin(5, "chsrc: 选中镜像站: ", source->mirror->abbr, " (", source->mirror->code, ")"));
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}
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void
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chsrc_say_thanks (source_info* source)
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{
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xy_success(xy_2strjoin("chsrc: 感谢镜像提供方: ", source->mirror->name));
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}
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void
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ensure_root ()
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{
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char* euid = getenv("$EUID");
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if (NULL==euid) {
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FILE* fp = popen("id -u", "r");
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char buf[10] = {0};
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fgets(buf, 10, fp);
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fclose(fp);
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if (0!=atoi(buf)) goto not_root;
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else return;
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} else {
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if (0!=atoi(euid)) goto not_root;
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else return;
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}
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not_root:
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xy_error("chsrc: 请在命令前使用 sudo 来保证必要的权限");
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exit(1);
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}
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/* Target Info */
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typedef struct {
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void (*setfn)(char* option);
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void (*getfn)(char* option);
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source_info* sources;
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size_t sources_n;
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} target_info;
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#define def_target_info(t) target_info t##_target = {t##_setsrc, t##_getsrc, t##_sources, t##_sources_n}
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