mirror of
https://github.com/lightpanda-io/browser.git
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Merge pull request #299 from lightpanda-io/cli_refacto
cli: code refacto
This commit is contained in:
Francis Bouvier
369
src/main.zig
369
src/main.zig
@@ -31,26 +31,7 @@ const apiweb = @import("apiweb.zig");
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pub const Types = jsruntime.reflect(apiweb.Interfaces);
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pub const UserContext = apiweb.UserContext;
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// Default options
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const Host = "127.0.0.1";
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const Port = 3245;
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const Timeout = 3; // in seconds
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const usage =
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\\usage: {s} [options] [URL]
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\\
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\\ start Lightpanda browser
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\\
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\\ * if an url is provided the browser will fetch the page and exit
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\\ * otherwhise the browser starts a CDP server
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\\
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\\ -h, --help Print this help message and exit.
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\\ --host Host of the CDP server (default "127.0.0.1")
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\\ --port Port of the CDP server (default "3245")
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\\ --timeout Timeout for incoming connections of the CDP server (in seconds, default "3")
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\\ --dump Dump document in stdout (fetch mode only)
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\\
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;
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const log = std.log.scoped(.cli);
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// Inspired by std.net.StreamServer in Zig < 0.12
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pub const StreamServer = struct {
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@@ -147,14 +128,159 @@ pub const StreamServer = struct {
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}
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};
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fn printUsageExit(execname: []const u8, res: u8) void {
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const usage =
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\\usage: {s} [options] [URL]
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\\
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\\ start Lightpanda browser
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\\
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\\ * if an url is provided the browser will fetch the page and exit
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\\ * otherwhise the browser starts a CDP server
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\\
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\\ -h, --help Print this help message and exit.
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\\ --host Host of the CDP server (default "127.0.0.1")
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\\ --port Port of the CDP server (default "3245")
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\\ --timeout Timeout for incoming connections of the CDP server (in seconds, default "3")
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\\ --dump Dump document in stdout (fetch mode only)
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\\
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;
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fn printUsageExit(execname: []const u8, res: u8) anyerror {
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std.io.getStdErr().writer().print(usage, .{execname}) catch |err| {
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std.log.err("Print usage error: {any}", .{err});
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std.posix.exit(1);
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return error.Cli;
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};
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std.posix.exit(res);
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if (res == 1) return error.Usage;
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return error.NoError;
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}
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const CliModeTag = enum {
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server,
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fetch,
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};
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const CliMode = union(CliModeTag) {
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server: Server,
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fetch: Fetch,
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const Server = struct {
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execname: []const u8 = undefined,
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args: *std.process.ArgIterator = undefined,
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addr: std.net.Address = undefined,
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host: []const u8 = Host,
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port: u16 = Port,
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timeout: u8 = Timeout,
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// default options
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const Host = "127.0.0.1";
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const Port = 3245;
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const Timeout = 3; // in seconds
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};
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const Fetch = struct {
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execname: []const u8 = undefined,
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args: *std.process.ArgIterator = undefined,
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url: []const u8 = "",
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dump: bool = false,
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};
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fn init(alloc: std.mem.Allocator, args: *std.process.ArgIterator) !CliMode {
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args.* = try std.process.argsWithAllocator(alloc);
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errdefer args.deinit();
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const execname = args.next().?;
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var default_mode: CliModeTag = .server;
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var _server = Server{};
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var _fetch = Fetch{};
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while (args.next()) |opt| {
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if (std.mem.eql(u8, "-h", opt) or std.mem.eql(u8, "--help", opt)) {
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return printUsageExit(execname, 0);
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}
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if (std.mem.eql(u8, "--dump", opt)) {
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_fetch.dump = true;
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continue;
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}
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if (std.mem.eql(u8, "--host", opt)) {
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if (args.next()) |arg| {
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_server.host = arg;
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continue;
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} else {
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std.log.err("--host not provided\n", .{});
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return printUsageExit(execname, 1);
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}
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}
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if (std.mem.eql(u8, "--port", opt)) {
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if (args.next()) |arg| {
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_server.port = std.fmt.parseInt(u16, arg, 10) catch |err| {
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log.err("--port {any}\n", .{err});
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return printUsageExit(execname, 1);
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};
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continue;
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} else {
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log.err("--port not provided\n", .{});
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return printUsageExit(execname, 1);
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}
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}
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if (std.mem.eql(u8, "--timeout", opt)) {
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if (args.next()) |arg| {
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_server.timeout = std.fmt.parseInt(u8, arg, 10) catch |err| {
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log.err("--timeout {any}\n", .{err});
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return printUsageExit(execname, 1);
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};
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continue;
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} else {
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log.err("--timeout not provided\n", .{});
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return printUsageExit(execname, 1);
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}
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}
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// unknown option
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if (std.mem.startsWith(u8, opt, "--")) {
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log.err("unknown option\n", .{});
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return printUsageExit(execname, 1);
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}
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// other argument is considered to be an URL, ie. fetch mode
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default_mode = .fetch;
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// allow only one url
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if (_fetch.url.len != 0) {
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log.err("more than 1 url provided\n", .{});
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return printUsageExit(execname, 1);
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}
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_fetch.url = opt;
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}
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if (default_mode == .server) {
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// server mode
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_server.addr = std.net.Address.parseIp4(_server.host, _server.port) catch |err| {
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log.err("address (host:port) {any}\n", .{err});
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return printUsageExit(execname, 1);
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};
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_server.execname = execname;
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_server.args = args;
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return CliMode{ .server = _server };
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} else {
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// fetch mode
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_fetch.execname = execname;
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_fetch.args = args;
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return CliMode{ .fetch = _fetch };
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}
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}
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fn deinit(self: CliMode) void {
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switch (self) {
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inline .server, .fetch => |*_mode| {
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_mode.args.deinit();
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},
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}
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}
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};
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pub fn main() !void {
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// allocator
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@@ -178,146 +304,79 @@ pub fn main() !void {
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}
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// args
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var args = try std.process.argsWithAllocator(alloc);
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defer args.deinit();
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const execname = args.next().?;
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var server_mode = true;
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// fetch mode variables
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var url: []const u8 = "";
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var dump: bool = false;
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// server mode variables
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var host: []const u8 = Host;
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var port: u16 = Port;
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var addr: std.net.Address = undefined;
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var timeout: u8 = undefined;
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while (args.next()) |opt| {
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if (std.mem.eql(u8, "-h", opt) or std.mem.eql(u8, "--help", opt)) {
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printUsageExit(execname, 0);
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}
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if (std.mem.eql(u8, "--dump", opt)) {
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dump = true;
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continue;
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}
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if (std.mem.eql(u8, "--host", opt)) {
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if (args.next()) |arg| {
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host = arg;
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continue;
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} else {
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std.log.err("--host not provided\n", .{});
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return printUsageExit(execname, 1);
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}
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}
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if (std.mem.eql(u8, "--port", opt)) {
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if (args.next()) |arg| {
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port = std.fmt.parseInt(u16, arg, 10) catch |err| {
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std.log.err("--port {any}\n", .{err});
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return printUsageExit(execname, 1);
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};
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continue;
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} else {
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std.log.err("--port not provided\n", .{});
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return printUsageExit(execname, 1);
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}
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}
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if (std.mem.eql(u8, "--timeout", opt)) {
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if (args.next()) |arg| {
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timeout = std.fmt.parseInt(u8, arg, 10) catch |err| {
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std.log.err("--timeout {any}\n", .{err});
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return printUsageExit(execname, 1);
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};
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continue;
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} else {
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std.log.err("--timeout not provided\n", .{});
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return printUsageExit(execname, 1);
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}
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}
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// unknown option
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if (std.mem.startsWith(u8, opt, "--")) {
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std.log.err("unknown option\n", .{});
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return printUsageExit(execname, 1);
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}
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// other argument is considered to be an URL, ie. fetch mode
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server_mode = false;
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// allow only one url
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if (url.len != 0) {
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std.log.err("more than 1 url provided\n", .{});
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return printUsageExit(execname, 1);
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}
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url = opt;
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}
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if (server_mode) {
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// server mode
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addr = std.net.Address.parseIp4(host, port) catch |err| {
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std.log.err("address (host:port) {any}\n", .{err});
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return printUsageExit(execname, 1);
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};
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// server
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var srv = StreamServer.init(.{
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.reuse_address = true,
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.reuse_port = true,
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.nonblocking = true,
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});
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defer srv.deinit();
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srv.listen(addr) catch |err| {
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std.log.err("address (host:port) {any}\n", .{err});
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return printUsageExit(execname, 1);
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};
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defer srv.close();
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std.log.info("Listening on: {s}:{d}...", .{ host, port });
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// loop
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var loop = try jsruntime.Loop.init(alloc);
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defer loop.deinit();
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// listen
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try server.listen(alloc, &loop, srv.sockfd.?, std.time.ns_per_s * @as(u64, timeout));
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} else {
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// fetch mode
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if (url.len == 0) {
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try std.io.getStdErr().writer().print(usage, .{execname});
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var args: std.process.ArgIterator = undefined;
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const cli_mode = CliMode.init(alloc, &args) catch |err| {
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if (err == error.NoError) {
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std.posix.exit(0);
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} else {
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std.posix.exit(1);
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}
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return;
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};
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defer cli_mode.deinit();
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const vm = jsruntime.VM.init();
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defer vm.deinit();
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switch (cli_mode) {
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.server => |mode| {
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var loop = try jsruntime.Loop.init(alloc);
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defer loop.deinit();
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// server
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var srv = StreamServer.init(.{
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.reuse_address = true,
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.reuse_port = true,
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.nonblocking = true,
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});
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defer srv.deinit();
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var browser = Browser{};
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try Browser.init(&browser, alloc, &loop, vm);
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defer browser.deinit();
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srv.listen(mode.addr) catch |err| {
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log.err("address (host:port) {any}\n", .{err});
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return printUsageExit(mode.execname, 1);
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};
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defer srv.close();
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log.info("Server mode: listening on {s}:{d}...", .{ mode.host, mode.port });
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const page = try browser.session.createPage();
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// loop
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var loop = try jsruntime.Loop.init(alloc);
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defer loop.deinit();
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_ = page.navigate(url, null) catch |err| switch (err) {
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error.UnsupportedUriScheme, error.UriMissingHost => {
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std.log.err("'{s}' is not a valid URL ({any})\n", .{ url, err });
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return printUsageExit(execname, 1);
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},
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else => {
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std.log.err("'{s}' fetching error ({any})s\n", .{ url, err });
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return printUsageExit(execname, 1);
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},
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};
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// listen
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try server.listen(alloc, &loop, srv.sockfd.?, std.time.ns_per_s * @as(u64, mode.timeout));
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},
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try page.wait();
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.fetch => |mode| {
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log.debug("Fetch mode: url {s}, dump {any}", .{ mode.url, mode.dump });
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if (dump) {
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try page.dump(std.io.getStdOut());
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}
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// vm
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const vm = jsruntime.VM.init();
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defer vm.deinit();
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// loop
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var loop = try jsruntime.Loop.init(alloc);
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defer loop.deinit();
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// browser
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var browser = Browser{};
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try Browser.init(&browser, alloc, &loop, vm);
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defer browser.deinit();
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// page
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const page = try browser.session.createPage();
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_ = page.navigate(mode.url, null) catch |err| switch (err) {
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error.UnsupportedUriScheme, error.UriMissingHost => {
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log.err("'{s}' is not a valid URL ({any})\n", .{ mode.url, err });
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return printUsageExit(mode.execname, 1);
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},
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else => {
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log.err("'{s}' fetching error ({any})s\n", .{ mode.url, err });
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return printUsageExit(mode.execname, 1);
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},
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};
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try page.wait();
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// dump
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if (mode.dump) {
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try page.dump(std.io.getStdOut());
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}
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},
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}
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}
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