Provide abstraction for headers

Basic abstraction wrapping existing std.http.Headers to provide a stable
interface.

README.md

@@ -27,8 +27,8 @@ If you are interested in _Jetzig_ you will probably find these tools interesting
 * :white_check_mark: Cookies.
 * :white_check_mark: Error handling.
 * :white_check_mark: Static content from /public directory.
-* :x: Static content generation.
-* :x: Headers (available but not yet wrapped).
+* :white_check_mark: Headers (available but not yet wrapped).
+* :x: Static content generation (nearly there!).
 * :x: Param/JSON payload parsing/abstracting.
 * :x: Development-mode responses for debugging.
 * :x: Environment configurations (develompent/production/etc.)

build.zig

@@ -90,7 +90,10 @@ pub const CompileViewsStep = struct {
             .makeFn = &make,
         });
         const compile_step_view = owner.allocator.create(CompileViewsStep) catch @panic("Out of memory");
-        compile_step_view.* = .{ .step = step, .template_path = options.template_path, };
+        compile_step_view.* = .{
+            .step = step,
+            .template_path = options.template_path,
+        };
         return compile_step_view;
     }
 

src/jetzig.zig

@@ -162,5 +162,5 @@ pub fn base64Decode(allocator: std.mem.Allocator, string: []const u8) ![]const u
 }
 
 test {
-    @import("std").testing.refAllDeclsRecursive(@This());
+    @import("std").testing.refAllDecls(@This());
 }

src/jetzig/http.zig

@@ -7,4 +7,5 @@ pub const Request = @import("http/Request.zig");
 pub const Response = @import("http/Response.zig");
 pub const Session = @import("http/Session.zig");
 pub const Cookies = @import("http/Cookies.zig");
+pub const Headers = @import("http/Headers.zig");
 pub const status_codes = @import("http/status_codes.zig");

src/jetzig/http/Headers.zig

@@ -0,0 +1,30 @@
+const std = @import("std");
+
+allocator: std.mem.Allocator,
+headers: std.http.Headers,
+
+const Self = @This();
+
+pub fn init(allocator: std.mem.Allocator, headers: std.http.Headers) Self {
+    return .{ .allocator = allocator, .headers = headers };
+}
+
+pub fn getFirstValue(self: *Self, key: []const u8) ?[]const u8 {
+    return self.headers.getFirstValue(key);
+}
+
+pub fn append(self: *Self, key: []const u8, value: []const u8) !void {
+    try self.headers.append(key, value);
+}
+
+test {
+    const allocator = std.testing.allocator;
+    var headers = std.http.Headers.init(allocator);
+    defer headers.deinit();
+    try headers.append("foo", "bar");
+    var jetzig_headers = Self.init(allocator, headers);
+    try std.testing.expectEqualStrings(
+        headers.getFirstValue("foo").?,
+        jetzig_headers.getFirstValue("foo").?,
+    );
+}

src/jetzig/http/Request.zig

@@ -12,7 +12,7 @@ pub const Format = enum { HTML, JSON, UNKNOWN };
 allocator: std.mem.Allocator,
 path: []const u8,
 method: Method,
-headers: std.http.Headers,
+headers: jetzig.http.Headers,
 segments: std.ArrayList([]const u8),
 server: *jetzig.http.Server,
 session: *jetzig.http.Session,
@@ -68,7 +68,7 @@ pub fn init(
         .allocator = allocator,
         .path = response.request.target,
         .method = method,
-        .headers = response.request.headers,
+        .headers = jetzig.http.Headers.init(allocator, response.request.headers),
         .server = server,
         .segments = segments,
         .cookies = cookies,

src/tests.zig

@@ -1,7 +1,4 @@
-// const Cookies = @import("http/Cookies.zig");
-
 test {
     _ = @import("jetzig.zig");
-    _ = @import("zmpl");
     @import("std").testing.refAllDeclsRecursive(@This());
 }