initial commit on code to work around 17015. Sourced from std lib

src/http_client_17015_issue.zig

@@ -0,0 +1,157 @@
+const std = @import("../std.zig");
+const Uri = std.http.Uri;
+
+pub const StartError = std.http.Connection.WriteError || error{ InvalidContentLength, UnsupportedTransferEncoding };
+
+///////////////////////////////////////////////////////////////////////////
+/// This function imported from:
+/// https://github.com/ziglang/zig/blob/0.11.0/lib/std/http/Client.zig#L538-L636
+///
+/// The first commit of this file will be unchanged from 0.11.0 to more
+/// clearly indicate changes moving forward. The plan is to change
+/// only the two w.print lines for req.uri 16 and 18 lines down from this comment
+///////////////////////////////////////////////////////////////////////////
+/// Send the request to the server.
+pub fn start(req: *std.http.Client.Request) StartError!void {
+    var buffered = std.io.bufferedWriter(req.connection.?.data.writer());
+    const w = buffered.writer();
+
+    try w.writeAll(@tagName(req.method));
+    try w.writeByte(' ');
+
+    if (req.method == .CONNECT) {
+        try w.writeAll(req.uri.host.?);
+        try w.writeByte(':');
+        try w.print("{}", .{req.uri.port.?});
+    } else if (req.connection.?.data.proxied) {
+        // proxied connections require the full uri
+        try w.print("{+/}", .{req.uri});
+    } else {
+        try w.print("{/}", .{req.uri});
+    }
+
+    try w.writeByte(' ');
+    try w.writeAll(@tagName(req.version));
+    try w.writeAll("\r\n");
+
+    if (!req.headers.contains("host")) {
+        try w.writeAll("Host: ");
+        try w.writeAll(req.uri.host.?);
+        try w.writeAll("\r\n");
+    }
+
+    if (!req.headers.contains("user-agent")) {
+        try w.writeAll("User-Agent: zig/");
+        try w.writeAll(@import("builtin").zig_version_string);
+        try w.writeAll(" (std.http)\r\n");
+    }
+
+    if (!req.headers.contains("connection")) {
+        try w.writeAll("Connection: keep-alive\r\n");
+    }
+
+    if (!req.headers.contains("accept-encoding")) {
+        try w.writeAll("Accept-Encoding: gzip, deflate, zstd\r\n");
+    }
+
+    if (!req.headers.contains("te")) {
+        try w.writeAll("TE: gzip, deflate, trailers\r\n");
+    }
+
+    const has_transfer_encoding = req.headers.contains("transfer-encoding");
+    const has_content_length = req.headers.contains("content-length");
+
+    if (!has_transfer_encoding and !has_content_length) {
+        switch (req.transfer_encoding) {
+            .chunked => try w.writeAll("Transfer-Encoding: chunked\r\n"),
+            .content_length => |content_length| try w.print("Content-Length: {d}\r\n", .{content_length}),
+            .none => {},
+        }
+    } else {
+        if (has_content_length) {
+            const content_length = std.fmt.parseInt(u64, req.headers.getFirstValue("content-length").?, 10) catch return error.InvalidContentLength;
+
+            req.transfer_encoding = .{ .content_length = content_length };
+        } else if (has_transfer_encoding) {
+            const transfer_encoding = req.headers.getFirstValue("transfer-encoding").?;
+            if (std.mem.eql(u8, transfer_encoding, "chunked")) {
+                req.transfer_encoding = .chunked;
+            } else {
+                return error.UnsupportedTransferEncoding;
+            }
+        } else {
+            req.transfer_encoding = .none;
+        }
+    }
+
+    try w.print("{}", .{req.headers});
+
+    try w.writeAll("\r\n");
+
+    try buffered.flush();
+}
+
+///////////////////////////////////////////////////////////////////////////
+/// This function imported from:
+/// https://github.com/ziglang/zig/blob/0.11.0/lib/std/Uri.zig#L209-L264
+///
+/// The first commit of this file will be unchanged from 0.11.0 to more
+/// clearly indicate changes moving forward. The plan is to change
+/// only the writeEscapedPath call 42 lines down from this comment
+///////////////////////////////////////////////////////////////////////////
+pub fn format(
+    uri: Uri,
+    comptime fmt: []const u8,
+    options: std.fmt.FormatOptions,
+    writer: anytype,
+) @TypeOf(writer).Error!void {
+    _ = options;
+
+    const needs_absolute = comptime std.mem.indexOf(u8, fmt, "+") != null;
+    const needs_path = comptime std.mem.indexOf(u8, fmt, "/") != null or fmt.len == 0;
+    const needs_fragment = comptime std.mem.indexOf(u8, fmt, "#") != null;
+
+    if (needs_absolute) {
+        try writer.writeAll(uri.scheme);
+        try writer.writeAll(":");
+        if (uri.host) |host| {
+            try writer.writeAll("//");
+
+            if (uri.user) |user| {
+                try writer.writeAll(user);
+                if (uri.password) |password| {
+                    try writer.writeAll(":");
+                    try writer.writeAll(password);
+                }
+                try writer.writeAll("@");
+            }
+
+            try writer.writeAll(host);
+
+            if (uri.port) |port| {
+                try writer.writeAll(":");
+                try std.fmt.formatInt(port, 10, .lower, .{}, writer);
+            }
+        }
+    }
+
+    if (needs_path) {
+        if (uri.path.len == 0) {
+            try writer.writeAll("/");
+        } else {
+            try Uri.writeEscapedPath(writer, uri.path);
+        }
+
+        if (uri.query) |q| {
+            try writer.writeAll("?");
+            try Uri.writeEscapedQuery(writer, q);
+        }
+
+        if (needs_fragment) {
+            if (uri.fragment) |f| {
+                try writer.writeAll("#");
+                try Uri.writeEscapedQuery(writer, f);
+            }
+        }
+    }
+}