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OrcaPrinterAgent: Thumbnails over http

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Lam Wei Lun
2026-10-08 11:18:24 +08:00
parent faa64ab089
commit b99a9a06f3
3 changed files with 10 additions and 139 deletions
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src/slic3r/Utils/OrcaPrinterAgent.cpp
+10 -92
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@@ -1964,39 +1964,6 @@ int OrcaPrinterAgent::list_printer_files(const std::string& dev_id, PrinterFileL
});
}
// Pure pick of the widest thumbnail path from Moonraker's /server/files/thumbnails
// reply. The `result` array is ordered smallest-first, so the largest `width` is
// chosen. The key was renamed across Moonraker versions; both spellings are accepted.
// Malformed replies and entries without a usable path yield an empty string.
std::string OrcaPrinterAgent::parse_thumbnail_path(const std::string& body)
{
const nlohmann::json envelope = nlohmann::json::parse(body, nullptr, false);
if (envelope.is_discarded() || !envelope.is_object())
return {};
const auto result_it = envelope.find("result");
if (result_it == envelope.end() || !result_it->is_array())
return {};
std::string path;
int best_width = -1;
for (const auto& item : *result_it) {
if (!item.is_object())
continue;
const char* key = item.contains("thumbnail_path") ? "thumbnail_path" : "relative_path";
if (!item.contains(key) || !item[key].is_string())
continue;
const int width = (item.contains("width") && item["width"].is_number()) ? item["width"].get<int>() : 0;
if (width > best_width) {
best_width = width;
path = item[key].get<std::string>();
}
}
return path;
}
// Pure normalization of the files.metadata MQTT reply: the `files` object's
// estimated_time (seconds), filament_total (mm) and filament_weight_total (grams;
// OrcaSonar currently reports only filament_total). A malformed reply or any
@@ -2028,27 +1995,7 @@ PrinterFileMetadata OrcaPrinterAgent::parse_files_metadata_reply(const std::stri
return meta;
}
// Percent-encode each '/'-separated segment, leaving the separators themselves
// intact so the caller keeps the directory structure of a gcodes-relative path.
std::string OrcaPrinterAgent::encode_file_path(const std::string& path)
{
std::string encoded;
size_t segment_start = 0;
while (segment_start <= path.size()) {
const size_t segment_end = path.find('/', segment_start);
if (!encoded.empty() || segment_start > 0)
encoded += '/';
encoded += Http::url_encode(path.substr(segment_start, segment_end - segment_start));
if (segment_end == std::string::npos)
break;
segment_start = segment_end + 1;
}
return encoded;
}
// Fetch one file's embedded thumbnail: first resolve its path via the thumbnails
// listing, then download the image bytes. Mirrors list_printer_files for the
// connection snapshot and off-thread marshalling; the worker captures no `this`.
// Fetch one file's thumbnail over HTTP; the worker captures no `this`.
int OrcaPrinterAgent::get_printer_file_thumbnail(const std::string& dev_id, const std::string& path, PrinterFileThumbnailFn callback)
{
std::string origin;
@@ -2081,9 +2028,8 @@ int OrcaPrinterAgent::get_printer_file_thumbnail(const std::string& dev_id, cons
std::string image;
int result = BAMBU_NETWORK_ERR_CONNECTION_TO_SERVER_FAILED;
std::string thumb_body;
bool listed = false;
auto http = Http::get(origin + "/server/files/thumbnails?filename=" + Http::url_encode(path));
std::string url = origin + "/files/thumbnail?root=gcodes&path=" + Http::url_encode(path);
auto http = Http::get(url);
http.tls_verify(use_ssl);
if (!ca_file.empty())
http.ca_file(ca_file);
@@ -2091,47 +2037,19 @@ int OrcaPrinterAgent::get_printer_file_thumbnail(const std::string& dev_id, cons
.timeout_max(15)
.on_complete([&](std::string b, unsigned status) {
if (status == 200) {
thumb_body = std::move(b);
listed = true;
image = std::move(b);
}
result = BAMBU_NETWORK_SUCCESS;
})
.on_error([&](std::string, std::string err, unsigned status) {
BOOST_LOG_TRIVIAL(warning) << "OrcaPrinterAgent: thumbnail list request failed status=" << status << " err=" << err;
if (status == 404) {
result = BAMBU_NETWORK_SUCCESS;
return;
}
BOOST_LOG_TRIVIAL(warning) << "OrcaPrinterAgent: thumbnail fetch failed status=" << status << " err=" << err;
})
.perform_sync();
if (listed) {
if (nlohmann::json::parse(thumb_body, nullptr, false).is_discarded()) {
result = BAMBU_NETWORK_ERR_CONNECTION_TO_SERVER_FAILED;
} else {
const std::string thumb_path = parse_thumbnail_path(thumb_body);
if (thumb_path.empty()) {
// No embedded thumbnail: a success the caller caches.
result = BAMBU_NETWORK_SUCCESS;
} else {
// The returned path is relative to the gcodes root, served at
// /server/files/gcodes; an explicit gcodes/ prefix is served at /server/files.
const std::string root = thumb_path.rfind("gcodes/", 0) == 0 ? "/server/files/" : "/server/files/gcodes/";
auto image_http = Http::get(origin + root + encode_file_path(thumb_path));
image_http.tls_verify(use_ssl);
if (!ca_file.empty())
image_http.ca_file(ca_file);
image_http.timeout_connect(5)
.timeout_max(15)
.on_complete([&](std::string b, unsigned status) {
if (status == 200) {
image = std::move(b);
result = BAMBU_NETWORK_SUCCESS;
}
})
.on_error([&](std::string, std::string err, unsigned status) {
BOOST_LOG_TRIVIAL(warning) << "OrcaPrinterAgent: thumbnail fetch failed status=" << status << " err=" << err;
})
.perform_sync();
}
}
}
if (!callback)
return;
if (queue)