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Author SHA1 Message Date
998d955f85 pin zhp commit 2021-04-12 21:34:43 -03:00
55effa0b2f use my own zhp fork 2021-04-12 17:47:52 -03:00
e654e95aae move impl to zhp handlers 2021-04-12 17:37:53 -03:00
2 changed files with 72 additions and 230 deletions

View file

@ -18,12 +18,83 @@ const IndexHandler = struct {
}
};
const UploadHandler = struct {
const start = std.mem.indexOf(u8, template, key).?;
const end = start + key.len;
pub fn post(self: *@This(), req: *Request, resp: *Response) !void {
var content_type = req.headers.getDefault("Content-Type", "");
if (!std.mem.startsWith(u8, content_type, "multipart/form-data")) {
resp.status = web.responses.BAD_REQUEST;
return;
}
var form = web.forms.Form.init(resp.allocator);
form.parse(req) catch |err| switch (err) {
error.NotImplemented => {
resp.status = web.responses.REQUEST_ENTITY_TOO_LARGE;
try resp.stream.writeAll("TODO: Handle large uploads");
return;
},
else => return err,
};
var part = form.files.get("file").?;
var extensions = registry.getExtensionsByType(part.content_type);
if (extensions == null) return error.InvalidContentMimeType;
const extension = extensions.?.items[0];
var image_id_buffer: [256]u8 = undefined;
const image_id = generateImageId(&image_id_buffer);
var image_path_buffer: [512]u8 = undefined;
const image_path = try std.fmt.bufPrint(
&image_path_buffer,
"{s}/{s}{s}",
.{ images_dir_path, image_id, extension },
);
const image_file = try std.fs.cwd().createFile(image_path, .{});
try image_file.writer().writeAll(part.body);
try resp.stream.writeAll(image_path);
return;
}
};
const FetchHandler = struct {
pub fn get(self: *@This(), req: *Request, resp: *Response) !void {
const filename = req.args.?[0].?;
std.log.info("got name: {s}", .{filename});
var image_path_buffer: [512]u8 = undefined;
const images_dir = try std.fs.cwd().openDir(images_dir_path, .{});
const image_path = try std.fmt.bufPrint(
&image_path_buffer,
"{s}/{s}",
.{ images_dir_path, filename },
);
// TODO return 404 on error
const image_file = try std.fs.cwd().openFile(image_path, .{ .read = false });
while (true) {
var file_write_buffer: [1024]u8 = undefined;
const bytes_read = try image_file.read(&file_write_buffer);
if (bytes_read == 0) return;
try resp.stream.writeAll(&file_write_buffer);
}
}
};
pub const io_mode = .evented;
pub const log_level = .debug;
// The routes must be defined in the "root"
pub const routes = [_]web.Route{
web.Route.create("index", "/", IndexHandler),
web.Route.create("upload", "/api/upload", UploadHandler),
web.Route.create("fetch", "/i/(.*)", FetchHandler),
};
pub const middleware = [_]web.Middleware{
@ -49,21 +120,6 @@ pub fn main() !void {
try app.listen("127.0.0.1", 8080);
try app.start();
}
// try http.listenAndServe(
// &gpa.allocator,
// bind_addr,
// comptime http.router.router(&[_]http.router.Route{
// http.router.get("/", index),
// http.router.post("/api/upload", uploadFile),
// http.router.get("/i/:filename", fetchFile),
// }),
// );
fn index(response: *http.Response, request: http.Request) !void {
try response.writer().writeAll("Hello Zig!");
}
fn generateImageId(buffer: []u8) []const u8 {
var i: usize = 0;
@ -79,217 +135,3 @@ fn generateImageId(buffer: []u8) []const u8 {
return buffer[0..i];
}
const StreamT = std.io.FixedBufferStream([]const u8);
const ContentDisposition = struct {
name: []const u8,
filename: []const u8,
};
const Part = struct {
disposition: ContentDisposition,
content_type: []const u8,
body: []const u8,
};
const Multipart = struct {
stream: StreamT,
boundary: []const u8,
cursor: usize = 0,
const Self = @This();
// TODO: move boundary_buffer to allocator
pub fn init(body: []const u8, content_type: []const u8, boundary_buffer: []u8) !Multipart {
// parse content_type into what we want (the boundary)
var it = std.mem.split(content_type, ";");
const should_be_multipart = it.next() orelse return error.MissingContentType;
std.log.debug("should be multipart: {s}", .{should_be_multipart});
if (!std.mem.eql(u8, should_be_multipart, "multipart/form-data"))
return error.InvalidContentType;
const should_be_boundary = it.next() orelse return error.MissingBoundary;
std.log.debug("should be boundary: {s} {d}", .{ should_be_boundary, should_be_boundary.len });
if (!std.mem.startsWith(u8, should_be_boundary, " boundary="))
return error.InvalidBoundary;
var boundary_it = std.mem.split(should_be_boundary, "=");
_ = boundary_it.next();
const boundary_value = boundary_it.next() orelse return error.InvalidBoundary;
std.log.debug("boundary value: {s} {d}", .{ boundary_value, boundary_value.len });
const actual_boundary_value = try std.fmt.bufPrint(boundary_buffer, "--{s}", .{boundary_value});
std.log.debug("actual boundary value: {s} {d}", .{ actual_boundary_value, actual_boundary_value.len });
return Self{
.stream = StreamT{ .buffer = body, .pos = 0 },
.boundary = actual_boundary_value,
};
}
pub fn next(self: *Self, hzzp_buffer: []u8) !?Part {
var reader = self.stream.reader();
// first self.boundary.len+2 bytes MUST be boundary + \r + \n
var boundary_buffer: [512]u8 = undefined;
const maybe_boundary_raw = (try reader.readUntilDelimiterOrEof(&boundary_buffer, '\n')).?;
const maybe_boundary_strip1 = std.mem.trimRight(u8, maybe_boundary_raw, "\n");
const maybe_boundary_strip2 = std.mem.trimRight(u8, maybe_boundary_strip1, "\r");
if (!std.mem.eql(u8, maybe_boundary_strip2, self.boundary)) {
std.log.err("expected '{s}' {}, got '{s}' {}", .{ self.boundary, self.boundary.len, maybe_boundary_strip2, maybe_boundary_strip2.len });
return error.InvalidBoundaryBody;
}
std.log.debug("got successful boundary {s}", .{maybe_boundary_strip2});
// from there ownwards, its just http!
var parser = hzzp.parser.request.create(hzzp_buffer, reader);
// This is a hack so that it doesnt try to parse an http header.
parser.state = .header;
var content_disposition: ?ContentDisposition = null;
var content_type: ?[]const u8 = null;
std.log.debug("next bytes: {any}", .{self.stream.buffer[self.stream.pos..(self.stream.pos + 50)]});
while (try parser.next()) |event| {
std.log.debug("got event: {}", .{event});
switch (event) {
.status => unreachable,
.end => break,
.head_done => {},
.header => |header| {
// TODO lowercase header name
if (std.mem.eql(u8, header.name, "Content-Disposition")) {
// parse disposition
var disposition_it = std.mem.split(header.value, ";");
_ = disposition_it.next();
var dispo_name: []const u8 = undefined;
var dispo_filename: []const u8 = undefined;
while (disposition_it.next()) |disposition_part_raw| {
const disposition_part = std.mem.trim(u8, disposition_part_raw, " ");
if (std.mem.eql(u8, disposition_part, "form-data")) continue;
// we have an A=B thing
var single_part_it = std.mem.split(disposition_part, "=");
const inner_part_name = single_part_it.next().?;
const inner_part_value_quoted = single_part_it.next().?;
const inner_part_value = std.mem.trim(u8, inner_part_value_quoted, "\"");
if (std.mem.eql(u8, inner_part_name, "name")) dispo_name = inner_part_value;
if (std.mem.eql(u8, inner_part_name, "filename")) dispo_filename = inner_part_value;
}
content_disposition = ContentDisposition{
.name = dispo_name,
.filename = dispo_filename,
};
std.log.debug("got content disposition for part! {}", .{content_disposition});
} else if (std.mem.eql(u8, header.name, "Content-Type")) {
content_type = header.value;
std.log.debug("got content type for part! {s}", .{content_type});
}
},
else => {
std.log.err("unexpected event: {}", .{event});
@panic("shit");
},
}
}
// the rest of the reader until we find a matching boundary is the part body.
// hzzp does not do it for us because it cant find a body encoding
// (content-length, content-encoding)
//
// we can use the fact that we know the reader is FixedBufferStream
// to extract the remaining body, then trim the boundary!
//
// THIS ASSUMES ONLY ONE FILE IS IN THE WIRE.
const remaining_body = self.stream.buffer[self.stream.pos..self.stream.buffer.len];
var end_boundary_buf: [512]u8 = undefined;
const boundary_end_marker = try std.fmt.bufPrint(&end_boundary_buf, "{s}--\r\n", .{self.boundary});
const actual_body = std.mem.trim(u8, remaining_body, boundary_end_marker);
return Part{
.disposition = content_disposition.?,
.content_type = content_type.?,
.body = actual_body,
};
}
};
fn uploadFile(response: *http.Response, request: http.Request) !void {
std.log.info("upload! got {d} bytes", .{request.body.len});
// find content-type header
var it = request.iterator();
var content_type: ?[]const u8 = null;
while (it.next()) |header| {
if (std.mem.eql(u8, header.key, "Content-Type")) {
content_type = header.value;
}
}
if (content_type == null) return error.InvalidContentType;
// parse multipart data
var boundary_buffer: [512]u8 = undefined;
var multipart = try Multipart.init(request.body, content_type.?, &boundary_buffer);
var hzzp_buffer: [1024]u8 = undefined;
while (try multipart.next(&hzzp_buffer)) |part| {
std.log.info(
"got part from multipart request! name='{s}' filename='{s}' content_type='{s}' length={d}",
.{ part.disposition.name, part.disposition.filename, part.content_type, part.body.len },
);
var extensions = registry.getExtensionsByType(part.content_type);
if (extensions == null) return error.InvalidContentMimeType;
const extension = extensions.?.items[0];
var image_id_buffer: [256]u8 = undefined;
const image_id = generateImageId(&image_id_buffer);
var image_path_buffer: [512]u8 = undefined;
const image_path = try std.fmt.bufPrint(
&image_path_buffer,
"{s}/{s}{s}",
.{ images_dir_path, image_id, extension },
);
const image_file = try std.fs.cwd().createFile(image_path, .{});
try image_file.writer().writeAll(part.body);
try response.writer().writeAll(image_path);
return;
}
}
fn fetchFile(response: *http.Response, request: http.Request, filename: []const u8) !void {
std.log.info("got name: {s}", .{filename});
var image_path_buffer: [512]u8 = undefined;
const images_dir = try std.fs.cwd().openDir(images_dir_path, .{});
const image_path = try std.fmt.bufPrint(
&image_path_buffer,
"{s}/{s}",
.{ images_dir_path, filename },
);
// TODO return 404 on error
const image_file = try std.fs.cwd().openFile(image_path, .{ .read = false });
while (true) {
var file_write_buffer: [1024]u8 = undefined;
const bytes_read = try image_file.read(&file_write_buffer);
if (bytes_read == 0) return;
try response.writer().writeAll(&file_write_buffer);
}
}

View file

@ -11,6 +11,6 @@ dev_dependencies:
name: mimetypes
main: mimetypes.zig
- src: git https://github.com/frmdstryr/zhp
- src: git https://github.com/lun-4/zhp commit-fb44af9
name: zhp
main: src/zhp.zig