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handle text content type with HTML

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For text content type (and application/json) we create a pseudo HTML
tree with the text value in a <pre> tag.

It allows CDP clients to interact with text content easily.
This commit is contained in:
Pierre Tachoire
2025-08-20 15:27:15 +02:00
parent bade412d30
commit ec71f8e2d9
1 changed files with 35 additions and 10 deletions
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45
src/browser/page.zig
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@@ -109,6 +109,7 @@ pub const Page = struct {
err: anyerror,
parsed: void,
html: parser.Parser,
text: parser.Parser,
raw: std.ArrayListUnmanaged(u8),
raw_done: []const u8,
};
@@ -207,6 +208,14 @@ pub const Page = struct {
return out.writeAll(buf.items);
},
.raw_done => |data| return out.writeAll(data),
.text => {
// processed below, along with .html
// return the <pre> element from the HTML
const doc = parser.documentHTMLToDocument(self.window.document);
const list = try parser.documentGetElementsByTagName(doc, "pre");
const pre = try parser.nodeListItem(list, 0) orelse return error.InvalidHTML;
return Dump.writeChildren(pre, .{}, out);
},
.html => {
// maybe page.wait timed-out, print what we have
log.warn(.http, "incomplete load", .{ .mode = "html" });
@@ -284,7 +293,7 @@ pub const Page = struct {
while (true) {
SW: switch (self.mode) {
.pre, .raw => {
.pre, .raw, .text => {
if (self.request_intercepted) {
// the page request was intercepted.
@@ -627,18 +636,27 @@ pub const Page = struct {
break :blk Mime.sniff(data);
} orelse .unknown;
const is_html = mime.isHTML();
log.debug(.http, "navigate first chunk", .{ .html = is_html, .len = data.len });
log.debug(.http, "navigate first chunk", .{ .content_type = mime.content_type, .len = data.len });
if (is_html) {
self.mode = .{ .html = try parser.Parser.init(mime.charset orelse "UTF-8") };
} else {
self.mode = .{ .raw = .{} };
}
self.mode = switch (mime.content_type) {
.text_html => .{ .html = try parser.Parser.init(mime.charset orelse "UTF-8") },
.application_json,
.text_javascript,
.text_css,
.text_plain,
=> blk: {
var p = try parser.Parser.init(mime.charset orelse "UTF-8");
try p.process("<html><head><meta charset=\"utf-8\"></head><body><pre>");
break :blk .{ .text = p };
},
else => .{ .raw = .{} },
};
}
switch (self.mode) {
.html => |*p| try p.process(data),
.html, .text => |*p| try p.process(data),
.raw => |*buf| try buf.appendSlice(self.arena, data),
.pre => unreachable,
.parsed => unreachable,
@@ -658,6 +676,13 @@ pub const Page = struct {
self.mode = .{ .raw_done = buf.items };
self.documentIsComplete();
},
.text => |*p| {
try p.process("</pre></body></html>");
const html_doc = p.html_doc;
p.deinit(); // don't need the parser anymore
try self.setDocument(html_doc);
self.documentIsComplete();
},
.html => |*p| {
const html_doc = p.html_doc;
p.deinit(); // don't need the parser anymore
@@ -719,7 +744,7 @@ pub const Page = struct {
self.clearTransferArena();
switch (self.mode) {
.html => |*p| p.deinit(), // don't need the parser anymore
.html, .text => |*p| p.deinit(), // don't need the parser anymore
else => {},
}
self.mode = .{ .err = err };