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|
const std = @import("std");
const http = std.http;
const Server = http.Server;
const Thread = std.Thread;
const max_header_size = 8192;
pub var running = false;
var server_thread: ?Thread = null;
var gpa = std.heap.GeneralPurposeAllocator(.{ .stack_trace_frames = 12 }){};
var allocator = gpa.allocator();
const execute_command = @import("methods/execute_command.zig").method;
const list_methods = @import("methods/list_methods.zig").method;
const server_log = std.log.scoped(.http_server);
pub const RpcMethods = .{
execute_command,
list_methods,
};
const JsonRpcRequest = struct {
jsonrpc: []const u8,
method: []const u8,
params: ?std.json.Value = null,
id: ?std.json.Value = null,
};
const JsonRpcError = struct {
code: isize,
message: []const u8,
data: ?std.json.Value = null,
};
const JsonRpcResponse = struct {
jsonrpc: []const u8,
result: ?std.json.Value = null,
@"error": ?JsonRpcError = null,
id: ?std.json.Value = null,
};
fn handleRequest(res: *Server.Response) !void {
server_log.info("{s} {s} {s}", .{ @tagName(res.request.method), @tagName(res.request.version), res.request.target });
if (!std.mem.startsWith(u8, res.request.target, "/rpc")) {
res.status = .not_found;
try res.do();
return;
}
const body = try res.reader().readAllAlloc(allocator, 8192);
defer allocator.free(body);
const resp = blk: {
var response: JsonRpcResponse = .{
.jsonrpc = "2.0",
};
const parsed = std.json.parseFromSlice(JsonRpcRequest, allocator, body, .{}) catch |err| {
server_log.err("Failed to parse request body {}", .{err});
if (@errorReturnTrace()) |trace| {
std.debug.dumpStackTrace(trace.*);
}
response.@"error" = .{
.code = -32700,
.message = "Parse error",
};
break :blk response;
};
defer parsed.deinit();
var request = parsed.value;
if (request.id) |request_id| {
if (request_id != .integer and request_id != .string) {
request.id = null;
}
}
response.id = request.id;
if (request.params) |request_params| {
if (request_params != .object and request_params != .array) {
response.@"error" = .{
.code = -32602,
.message = "Invalid params",
};
break :blk response;
}
}
inline for (RpcMethods) |method| {
if (std.mem.eql(u8, method.name, request.method)) {
response.result = method.func(allocator, request.params) catch |err| method_blk: {
response.@"error" = .{
.code = -32603,
.message = @errorName(err),
};
break :method_blk null;
};
break;
}
} else {
response.@"error" = .{
.code = -32601,
.message = "Method not found",
};
}
break :blk response;
};
const json_resp = try std.json.stringifyAlloc(allocator, resp, .{});
res.transfer_encoding = .{ .content_length = json_resp.len };
try res.do();
try res.writeAll(json_resp);
try res.finish();
}
fn runServer(srv: *Server) !void {
outer: while (running) {
var res = try srv.accept(.{
.allocator = allocator,
.header_strategy = .{ .dynamic = max_header_size },
});
defer res.deinit();
while (res.reset() != .closing) {
res.wait() catch |err| switch (err) {
error.HttpHeadersInvalid => continue :outer,
error.EndOfStream => continue,
else => return err,
};
try handleRequest(&res);
}
}
}
fn serverThread(addr: std.net.Address) !void {
var server = Server.init(allocator, .{ .reuse_address = true });
try server.listen(addr);
defer server.deinit();
defer _ = gpa.deinit();
runServer(&server) catch |err| {
server_log.err("server error: {}\n", .{err});
if (@errorReturnTrace()) |trace| {
std.debug.dumpStackTrace(trace.*);
}
_ = gpa.deinit();
std.os.exit(1);
};
}
pub fn start() !void {
if (server_thread == null) {
var addr = try std.net.Address.parseIp("127.0.0.1", 26505);
running = true;
server_thread = try Thread.spawn(.{}, serverThread, .{addr});
server_log.info("Started HTTP Server on {}", .{addr});
}
}
pub fn stop() void {
if (server_thread) |thread| {
running = false;
thread.join();
server_log.info("Stopped HTTP Server", .{});
}
}
|
