368 lines
12 KiB
C
368 lines
12 KiB
C
/* Deshab Browser — 全屏浏览器
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* 接入 net_stack.h 共享协议栈，实现 HTTP GET 与简单内容显示。
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* 地址栏输入 URL（如 http://10.0.2.2:8000/ 或 10.0.2.2），
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* Enter 发起请求，内容区显示 HTTP 响应（分离 header/body，移除 HTML 标签）。
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* Esc 退出。
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*/
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#include "../../firstInit/ascii_bitmaps.c"
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#include "../desktop_app.h"
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#include "../net_stack.h"
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#define CHAR_STEP 12
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#define CHAR_H 18
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#define URL_BUF_SIZE 128
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#define CONTENT_BUF_SIZE 32768
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#define DISPLAY_LINES 200
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/* 前向声明（do_fetch 引用 redraw_all_imm 和 br_ns_init） */
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static void redraw_all_imm(void);
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static int br_ns_init(void);
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static da_app_context g_ac;
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static da_cursor g_cursor;
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static da_mouse g_mouse;
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/* 地址栏 */
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static char url_buf[URL_BUF_SIZE] = "http://10.0.2.2:8000/";
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static int url_len = 22;
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static int url_focused = 1; /* 启动时地址栏聚焦 */
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/* 内容缓冲 */
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static u8 content_buf[CONTENT_BUF_SIZE];
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static u32 content_len = 0;
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static int content_scroll = 0;
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static int fetching = 0; /* 1=正在请求 */
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static char status_msg[64] = "Ready";
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/* ---- 状态消息 ---- */
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static void br_set_status(const char *s) {
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int i = 0;
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while (*s && i < 63) status_msg[i++] = *s++;
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status_msg[i] = 0;
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}
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/* ---- HTTP 请求（复制 shell cmd_curl 核心逻辑） ---- */
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static void do_fetch(void) {
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if (url_len == 0) { br_set_status("Empty URL"); return; }
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br_set_status("Initializing net...");
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redraw_all_imm();
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if (br_ns_init() != 0) {
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br_set_status("Net init failed");
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return;
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}
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/* 解析 URL: [http://]host[:port][/path] */
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const char *p = url_buf;
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if (p[0]=='h'&&p[1]=='t'&&p[2]=='t'&&p[3]=='p'&&p[4]==':'&&p[5]=='/'&&p[6]=='/') p += 7;
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char host[64]; int hl = 0;
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while (*p && *p != ':' && *p != '/' && hl < 63) host[hl++] = *p++;
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host[hl] = 0;
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if (!hl) { br_set_status("Bad host"); return; }
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u16 port = 80;
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if (*p == ':') {
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p++;
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u32 pv = 0; int digits = 0;
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while (*p >= '0' && *p <= '9') { pv = pv * 10 + (u32)(*p - '0'); p++; digits++; }
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if (digits && pv <= 65535) port = (u16)pv;
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}
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char path[128]; int pl = 0;
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if (*p == '/') {
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while (*p && *p != ' ' && pl < 127) path[pl++] = *p++;
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}
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if (!pl) { path[0] = '/'; pl = 1; }
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path[pl] = 0;
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/* DNS 解析 */
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br_set_status("Resolving...");
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redraw_all_imm();
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u32 ip;
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if (ns_dns_resolve(host, &ip) != 0) {
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br_set_status("DNS failed");
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return;
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}
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/* TCP 连接 */
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br_set_status("Connecting...");
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redraw_all_imm();
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if (ns_tcp_connect(ip, port, 3000) != 0) {
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br_set_status("TCP connect failed");
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return;
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}
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/* 构造 HTTP/1.0 请求 */
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static char req[512];
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int r = 0;
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const char *m = "GET "; while (*m) req[r++] = *m++;
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for (int i = 0; i < pl; i++) req[r++] = path[i];
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m = " HTTP/1.0\r\nHost: "; while (*m) req[r++] = *m++;
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for (int i = 0; i < hl; i++) req[r++] = host[i];
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m = "\r\nConnection: close\r\n\r\n"; while (*m) req[r++] = *m++;
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req[r] = 0;
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br_set_status("Sending request...");
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redraw_all_imm();
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if (ns_tcp_send((const u8 *)req, (u32)r) != 0) {
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br_set_status("Send failed");
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ns_tcp_close();
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return;
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}
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br_set_status("Receiving...");
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redraw_all_imm();
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int n = ns_tcp_recv(0, 0, 5000);
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ns_tcp_close();
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if (n < 0) { br_set_status("Connection reset"); return; }
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if (n == 0) { br_set_status("No response (timeout)"); return; }
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/* 复制响应到 content_buf */
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u32 total = ns_tcp_rx_len;
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u32 copy = (total < CONTENT_BUF_SIZE) ? total : CONTENT_BUF_SIZE;
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for (u32 i = 0; i < copy; i++) content_buf[i] = ns_tcp_rx[i];
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content_len = copy;
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content_scroll = 0;
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char sm[32]; int sp = 0;
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const char *ok = "OK "; while (*ok && sp < 30) sm[sp++] = *ok++;
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char nb[12]; ns_u32_dec(nb, copy);
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for (int i = 0; nb[i] && sp < 30; i++) sm[sp++] = nb[i];
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sm[sp] = 0;
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br_set_status(sm);
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}
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/* ---- 极简 HTML 文本提取：移除 <...> 标签，保留纯文本 ---- */
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static int html_to_text(const u8 *in, u32 in_len, u8 *out, u32 out_cap) {
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u32 oi = 0;
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int in_tag = 0;
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int prev_space = 0;
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for (u32 i = 0; i < in_len && oi < out_cap - 1; i++) {
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u8 c = in[i];
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if (c == '<') { in_tag = 1; continue; }
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if (c == '>') { in_tag = 0; continue; }
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if (in_tag) continue;
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/* 跳过 HTTP header（找到 \r\n\r\n 后才开始） */
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/* 将 等实体简化为空格 */
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if (c == '\r') continue;
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if (c == '\t') c = ' ';
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/* 连续空格压缩 */
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if (c == ' ') {
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if (prev_space) continue;
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prev_space = 1;
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} else {
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prev_space = 0;
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}
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out[oi++] = c;
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}
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out[oi] = 0;
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return (int)oi;
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}
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/* ---- 立即重绘（无鼠标光标保存/恢复，用于 fetching 过程） ---- */
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static void redraw_all_imm(void) {
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da_fill_bg(&g_ac, DA_BG_PRIMARY);
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da_draw_titlebar(&g_ac, "Browser", (i64)g_ac.fb_w);
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/* 地址栏 */
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int bar_y = DA_TITLEBAR_H + 6;
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int bar_h = 28;
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int bar_x = 12;
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int bar_w = (int)g_ac.fb_w - 24;
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u32 bar_bg = url_focused ? DA_BG_TERTIARY : DA_BG_SECONDARY;
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da_fill_rounded_rect(&g_ac, bar_x, bar_y, bar_w, bar_h, bar_bg, 6);
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da_rect_outline(&g_ac, bar_x, bar_y, bar_w, bar_h, url_focused ? DA_ACCENT : DA_BORDER, 6);
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/* URL 文本 + 光标 */
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int url_x = bar_x + 12;
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da_draw_string(&g_ac, url_buf, url_x, bar_y + 5, DA_TEXT_PRIMARY, bar_bg, CHAR_STEP);
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if (url_focused) {
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int cx = url_x + url_len * CHAR_STEP;
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da_fill_rect(&g_ac, cx, bar_y + 5, 2, CHAR_H, DA_ACCENT_LIGHT);
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}
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/* 提示 */
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int hint_y = bar_y + bar_h + 4;
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const char *hint = "Enter: fetch Esc: exit Up/Down: scroll";
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da_draw_string(&g_ac, hint, 12, hint_y, DA_TEXT_DIM, DA_BG_PRIMARY, CHAR_STEP);
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/* 内容区 */
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int content_y = hint_y + CHAR_H + 4;
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int content_x = 12;
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int content_w = (int)g_ac.fb_w - 24;
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int content_h = (int)g_ac.fb_h - content_y - DA_STATUSBAR_H - 8;
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da_fill_rounded_rect(&g_ac, content_x, content_y, content_w, content_h, DA_BG_SECONDARY, 4);
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da_rect_outline(&g_ac, content_x, content_y, content_w, content_h, DA_BORDER, 4);
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/* 内容显示 */
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if (content_len > 0) {
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/* 提取 body（跳过 HTTP header） */
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u32 body_off = 0;
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for (u32 i = 0; i + 3 < content_len; i++) {
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if (content_buf[i]=='\r' && content_buf[i+1]=='\n' &&
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content_buf[i+2]=='\r' && content_buf[i+3]=='\n') {
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body_off = i + 4;
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break;
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}
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}
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/* HTML 转纯文本 */
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static u8 plain[CONTENT_BUF_SIZE];
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int plain_len = html_to_text(content_buf + body_off, content_len - body_off, plain, CONTENT_BUF_SIZE);
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/* 按行显示 */
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int visible_cols = (content_w - 16) / CHAR_STEP;
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int visible_rows = (content_h - 8) / CHAR_H;
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int y = content_y + 4;
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int pos = 0;
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int line = 0;
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/* 跳过 scroll 行 */
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int skip = content_scroll;
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while (pos < plain_len && skip > 0) {
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if (plain[pos] == '\n') skip--;
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pos++;
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}
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while (pos < plain_len && line < visible_rows) {
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int ls = pos;
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while (pos < plain_len && plain[pos] != '\n' && pos - ls < visible_cols) pos++;
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int llen = pos - ls;
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for (int i = 0; i < llen; i++) {
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char c = (char)plain[ls + i];
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if (c < ' ' || c > '~') c = '.';
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char buf[2]; buf[0] = c; buf[1] = 0;
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da_draw_string(&g_ac, buf, content_x + 8 + i * CHAR_STEP, y, DA_TEXT_PRIMARY, DA_BG_SECONDARY, CHAR_STEP);
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}
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y += CHAR_H;
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line++;
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if (pos < plain_len && plain[pos] == '\n') pos++;
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}
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} else if (!fetching) {
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const char *empty = "No content. Enter URL and press Enter to fetch.";
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da_draw_string(&g_ac, empty, content_x + 16, content_y + 16, DA_TEXT_DIM, DA_BG_SECONDARY, CHAR_STEP);
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}
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/* 状态栏 */
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char status[96]; int p = 0;
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const char *s1 = "Browser | "; while (*s1 && p < 95) status[p++] = *s1++;
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for (int i = 0; status_msg[i] && p < 95; i++) status[p++] = status_msg[i];
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status[p] = 0;
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da_draw_statusbar(&g_ac, status, (i64)g_ac.fb_w, (i64)g_ac.fb_h);
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}
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static void redraw_all(void) {
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redraw_all_imm();
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da_cursor_save(&g_ac, &g_cursor);
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da_cursor_draw(&g_ac, &g_cursor, DA_CURSOR_COLOR);
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}
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/* ---- net_stack.h 的 ns_init 需要 dkm_kernel_api ---- */
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/* 重写 ns_init 以从 da_app_context 获取 kernel_api */
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static int br_ns_init(void) {
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if (ns_ready) return 0;
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u64 dkm_kernel_api = (u64)g_ac.kernel_api;
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if (!dkm_kernel_api) return -1;
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return ns_init(dkm_kernel_api);
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}
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__attribute__((visibility("default")))
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void dsk_entry(const da_boot_context *ctx) {
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__asm__ volatile("cli");
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da_slog("browser", "boot");
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if (!ctx || ctx->magic != DA_BOOT_MAGIC) {
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da_slog("browser", "bad context");
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for(;;) __asm__("hlt");
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}
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da_init(&g_ac, ctx);
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da_cursor_init(&g_cursor, (i64)g_ac.fb_w, (i64)g_ac.fb_h);
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da_mouse_init();
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/* 初始化网络协议栈 */
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br_ns_init();
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br_set_status("Ready");
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redraw_all();
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int e0 = 0, shift = 0;
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for (;;) {
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int need_redraw = 0;
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/* 鼠标轮询 */
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if (da_mouse_poll(&g_mouse, &g_cursor, (i64)g_ac.fb_w, (i64)g_ac.fb_h)) {
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need_redraw = 1;
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/* 点击地址栏聚焦 */
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int bar_y = DA_TITLEBAR_H + 6;
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int bar_h = 28;
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if (g_cursor.btn &&
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g_cursor.my >= bar_y && g_cursor.my < bar_y + bar_h &&
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g_cursor.mx >= 12 && g_cursor.mx < (int)g_ac.fb_w - 12) {
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url_focused = 1;
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need_redraw = 1;
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}
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}
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/* 键盘轮询 */
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u8 st = inb(0x64);
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if ((st & 1) && !(st & 0x20)) {
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u8 data = inb(0x60);
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u8 sc = data;
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if (sc == 0xE0) { e0 = 1; goto skip; }
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if (sc == 0x2A || sc == 0x36) { shift = 1; goto skip; }
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if (sc == 0xAA || sc == 0xB6) { shift = 0; goto skip; }
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if (sc & 0x80) { e0 = 0; goto skip; }
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if (sc == 0x01) { /* Esc */
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da_slog("browser", "exit");
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return;
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}
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/* 地址栏输入模式 */
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if (url_focused) {
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if (sc == 0x1C) { /* Enter - 发起请求 */
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url_focused = 0;
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fetching = 1;
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br_set_status("Fetching...");
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redraw_all();
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do_fetch();
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fetching = 0;
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need_redraw = 1;
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goto skip;
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}
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if (sc == 0x0E) { /* Backspace */
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if (url_len > 0) { url_len--; url_buf[url_len] = 0; }
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need_redraw = 1;
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goto skip;
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}
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char c = da_scan_to_ascii(sc, shift);
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if (c && c >= 32 && c <= 126 && url_len < URL_BUF_SIZE - 1) {
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/* 小写转大写便于 URL 输入（除协议头） */
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url_buf[url_len++] = c;
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url_buf[url_len] = 0;
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need_redraw = 1;
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}
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goto skip;
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}
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/* 内容浏览模式 */
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if (e0) {
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if (sc == 0x48) { if (content_scroll > 0) content_scroll--; need_redraw = 1; }
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else if (sc == 0x50) { content_scroll++; need_redraw = 1; }
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e0 = 0;
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goto skip;
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}
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if (sc == 0x49) { content_scroll -= 10; if (content_scroll < 0) content_scroll = 0; need_redraw = 1; }
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else if (sc == 0x51) { content_scroll += 10; need_redraw = 1; }
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else if (sc == 0x1C) { url_focused = 1; need_redraw = 1; } /* Enter 回到地址栏 */
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}
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skip:
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if (need_redraw) {
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da_cursor_restore(&g_ac, &g_cursor);
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redraw_all();
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}
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__asm__("pause");
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}
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}
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