2420780216

Committed 31 Mar 2026 12:17PM UTC coverage: 75.839%. First build

Build # 2420780216

Build Type

push

gitlab-ci

Committed by

vpodzime

Commit Message

feat: Large deployment logs are now trimmed to be accepted by the server

Deployment logs larger than 1 MiB are rejected by the
server which leads to two issues:

- excessive bandwith consumption when uploading such large logs
  only to be thrown away, and

- no deployment logs for particular device and particular failed
  deployment available at the server at all.

To prevent this, the client now trims large deployment logs and
only sends the biggest possible part of the logs from their end.

Ticket: MEN-9415
Changelog: title
Signed-off-by: Vratislav Podzimek <vratislav.podzimek+auto-signed@northern.tech>
(cherry picked from commit cecd63689)

Coverage Stats

46 of 55 new or added lines in 1 file covered. (83.64%)

7549 of 9954 relevant lines covered (75.84%)

14343.09 hits per line

Source File
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79.6

/src/mender-update/deployments/deployments.cpp

// Copyright 2023 Northern.tech AS
//
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
//
//        http://www.apache.org/licenses/LICENSE-2.0
//
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.

#include <mender-update/deployments.hpp>

#include <algorithm>
#include <sstream>
#include <string>

#include <api/api.hpp>
#include <api/client.hpp>
#include <common/common.hpp>
#include <common/error.hpp>
#include <common/events.hpp>
#include <common/expected.hpp>
#include <common/http.hpp>
#include <common/io.hpp>
#include <common/json.hpp>
#include <common/log.hpp>
#include <common/optional.hpp>
#include <common/path.hpp>
#include <mender-update/context.hpp>

namespace mender {
namespace update {
namespace deployments {

using namespace std;

namespace api = mender::api;
namespace common = mender::common;
namespace context = mender::update::context;
namespace error = mender::common::error;
namespace events = mender::common::events;
namespace expected = mender::common::expected;
namespace http = mender::common::http;
namespace io = mender::common::io;
namespace json = mender::common::json;
namespace log = mender::common::log;
namespace path = mender::common::path;

using ExpectedOffset = expected::expected<ifstream::off_type, error::Error>;

const DeploymentsErrorCategoryClass DeploymentsErrorCategory;

const char *DeploymentsErrorCategoryClass::name() const noexcept {
        return "DeploymentsErrorCategory";
}

string DeploymentsErrorCategoryClass::message(int code) const {
        switch (code) {
        case NoError:
                return "Success";
        case InvalidDataError:
                return "Invalid data error";
        case BadResponseError:
                return "Bad response error";
        case DeploymentAbortedError:
                return "Deployment was aborted on the server";
        }
        assert(false);
        return "Unknown";
}

error::Error MakeError(DeploymentsErrorCode code, const string &msg) {
        return error::Error(error_condition(code, DeploymentsErrorCategory), msg);
}

static const string check_updates_v1_uri = "/api/devices/v1/deployments/device/deployments/next";
static const string check_updates_v2_uri = "/api/devices/v2/deployments/device/deployments/next";

error::Error DeploymentClient::CheckNewDeployments(
        context::MenderContext &ctx, api::Client &client, CheckUpdatesAPIResponseHandler api_handler) {
        auto ex_dev_type = ctx.GetDeviceType();
        if (!ex_dev_type) {
                return ex_dev_type.error();
        }
        string device_type = ex_dev_type.value();

        auto ex_provides = ctx.LoadProvides();
        if (!ex_provides) {
                return ex_provides.error();
        }
        auto provides = ex_provides.value();
        if (provides.find("artifact_name") == provides.end()) {
                return MakeError(InvalidDataError, "Missing artifact name data");
        }

        stringstream ss;
        ss << R"({"device_provides":{)";
        ss << R"("device_type":")";
        ss << json::EscapeString(device_type);

        for (const auto &kv : provides) {
                ss << "\",\"" + json::EscapeString(kv.first) + "\":\"";
                ss << json::EscapeString(kv.second);
        }

        ss << R"("}})";

        string v2_payload = ss.str();
        log::Debug("deployments/next v2 payload " + v2_payload);
        http::BodyGenerator payload_gen = [v2_payload]() {
                return make_shared<io::StringReader>(v2_payload);
        };

        auto v2_req = make_shared<api::APIRequest>();
        v2_req->SetPath(check_updates_v2_uri);
        v2_req->SetMethod(http::Method::POST);
        v2_req->SetHeader("Content-Type", "application/json");
        v2_req->SetHeader("Content-Length", to_string(v2_payload.size()));
        v2_req->SetHeader("Accept", "application/json");
        v2_req->SetBodyGenerator(payload_gen);

        string v1_args = "artifact_name=" + http::URLEncode(provides["artifact_name"])
                                         + "&device_type=" + http::URLEncode(device_type);
        auto v1_req = make_shared<api::APIRequest>();
        v1_req->SetPath(check_updates_v1_uri + "?" + v1_args);
        v1_req->SetMethod(http::Method::GET);
        v1_req->SetHeader("Accept", "application/json");

        auto received_body = make_shared<vector<uint8_t>>();
        auto handle_data = [received_body, api_handler](unsigned status) {
                if (status == http::StatusOK) {
                        auto ex_j = json::Load(common::StringFromByteVector(*received_body));
                        if (ex_j) {
                                CheckUpdatesAPIResponse response {optional<json::Json> {ex_j.value()}};
                                api_handler(response);
                        } else {
                                api_handler(expected::unexpected(ex_j.error()));
                        }
                } else if (status == http::StatusNoContent) {
                        api_handler(CheckUpdatesAPIResponse {nullopt});
                } else {
                        log::Warning(
                                "DeploymentClient::CheckNewDeployments - received unhandled http response: "
                                + to_string(status));
                        api_handler(expected::unexpected(MakeError(
                                DeploymentAbortedError, "received unhandled HTTP response: " + to_string(status))));
                }
        };

        http::ResponseHandler header_handler =
                [received_body, api_handler](http::ExpectedIncomingResponsePtr exp_resp) {
                        if (!exp_resp) {
                                log::Error("Request to check new deployments failed: " + exp_resp.error().message);
                                CheckUpdatesAPIResponse response = expected::unexpected(exp_resp.error());
                                api_handler(response);
                                return;
                        }

                        auto resp = exp_resp.value();
                        received_body->clear();
                        auto body_writer = make_shared<io::ByteWriter>(received_body);
                        body_writer->SetUnlimited(true);
                        resp->SetBodyWriter(body_writer);
                };

        http::ResponseHandler v1_body_handler =
                [received_body, api_handler, handle_data](http::ExpectedIncomingResponsePtr exp_resp) {
                        if (!exp_resp) {
                                log::Error("Request to check new deployments failed: " + exp_resp.error().message);
                                CheckUpdatesAPIResponse response = expected::unexpected(exp_resp.error());
                                api_handler(response);
                                return;
                        }
                        auto resp = exp_resp.value();
                        auto status = resp->GetStatusCode();
                        if ((status == http::StatusOK) || (status == http::StatusNoContent)) {
                                handle_data(status);
                        } else {
                                auto ex_err_msg = api::ErrorMsgFromErrorResponse(*received_body);
                                string err_str;
                                if (ex_err_msg) {
                                        err_str = ex_err_msg.value();
                                } else {
                                        err_str = resp->GetStatusMessage();
                                }
                                api_handler(expected::unexpected(MakeError(
                                        BadResponseError,
                                        "Got unexpected response " + to_string(status) + ": " + err_str)));
                        }
                };

        http::ResponseHandler v2_body_handler = [received_body,
                                                                                         v1_req,
                                                                                         header_handler,
                                                                                         v1_body_handler,
                                                                                         api_handler,
                                                                                         handle_data,
                                                                                         &client](http::ExpectedIncomingResponsePtr exp_resp) {
                if (!exp_resp) {
                        log::Error("Request to check new deployments failed: " + exp_resp.error().message);
                        CheckUpdatesAPIResponse response = expected::unexpected(exp_resp.error());
                        api_handler(response);
                        return;
                }
                auto resp = exp_resp.value();
                auto status = resp->GetStatusCode();
                if ((status == http::StatusOK) || (status == http::StatusNoContent)) {
                        handle_data(status);
                } else if (status == http::StatusNotFound) {
                        log::Debug(
                                "POST request to v2 version of the deployments API failed, falling back to v1 version and GET");
                        auto err = client.AsyncCall(v1_req, header_handler, v1_body_handler);
                        if (err != error::NoError) {
                                api_handler(expected::unexpected(err.WithContext("While calling v1 endpoint")));
                        }
                } else {
                        auto ex_err_msg = api::ErrorMsgFromErrorResponse(*received_body);
                        string err_str;
                        if (ex_err_msg) {
                                err_str = ex_err_msg.value();
                        } else {
                                err_str = resp->GetStatusMessage();
                        }
                        api_handler(expected::unexpected(MakeError(
                                BadResponseError,
                                "Got unexpected response " + to_string(status) + ": " + err_str)));
                }
        };

        return client.AsyncCall(v2_req, header_handler, v2_body_handler);
}

static const string deployment_status_strings[static_cast<int>(DeploymentStatus::End_) + 1] = {
        "installing",
        "pause_before_installing",
        "downloading",
        "pause_before_rebooting",
        "rebooting",
        "pause_before_committing",
        "success",
        "failure",
        "already-installed"};

static const string deployments_uri_prefix = "/api/devices/v1/deployments/device/deployments";
static const string status_uri_suffix = "/status";

string DeploymentStatusString(DeploymentStatus status) {
        return deployment_status_strings[static_cast<int>(status)];
}

error::Error DeploymentClient::PushStatus(
        const string &deployment_id,
        DeploymentStatus status,
        const string &substate,
        api::Client &client,
        StatusAPIResponseHandler api_handler) {
        // Cannot push a status update without a deployment ID
        AssertOrReturnError(deployment_id != "");
        string payload = R"({"status":")" + DeploymentStatusString(status) + "\"";
        if (substate != "") {
                payload += R"(,"substate":")" + json::EscapeString(substate) + "\"}";
        } else {
                payload += "}";
        }
        http::BodyGenerator payload_gen = [payload]() {
                return make_shared<io::StringReader>(payload);
        };

        auto req = make_shared<api::APIRequest>();
        req->SetPath(http::JoinUrl(deployments_uri_prefix, deployment_id, status_uri_suffix));
        req->SetMethod(http::Method::PUT);
        req->SetHeader("Content-Type", "application/json");
        req->SetHeader("Content-Length", to_string(payload.size()));
        req->SetHeader("Accept", "application/json");
        req->SetBodyGenerator(payload_gen);

        auto received_body = make_shared<vector<uint8_t>>();
        return client.AsyncCall(
                req,
                [received_body, api_handler](http::ExpectedIncomingResponsePtr exp_resp) {
                        if (!exp_resp) {
                                log::Error("Request to push status data failed: " + exp_resp.error().message);
                                api_handler(exp_resp.error());
                                return;
                        }

                        auto body_writer = make_shared<io::ByteWriter>(received_body);
                        auto resp = exp_resp.value();
                        auto content_length = resp->GetHeader("Content-Length");
                        if (!content_length) {
                                log::Debug(
                                        "Failed to get content length from the deployment status API response headers: "
                                        + content_length.error().String());
                                body_writer->SetUnlimited(true);
                        } else {
                                auto ex_len = common::StringTo<size_t>(content_length.value());
                                if (!ex_len) {
                                        log::Error(
                                                "Failed to convert the content length from the deployment status API response headers to an integer: "
                                                + ex_len.error().String());
                                        body_writer->SetUnlimited(true);
                                } else {
                                        received_body->resize(ex_len.value());
                                }
                        }
                        resp->SetBodyWriter(body_writer);
                },
                [received_body, api_handler](http::ExpectedIncomingResponsePtr exp_resp) {
                        if (!exp_resp) {
                                log::Error("Request to push status data failed: " + exp_resp.error().message);
                                api_handler(exp_resp.error());
                                return;
                        }

                        auto resp = exp_resp.value();
                        auto status = resp->GetStatusCode();
                        if (status == http::StatusNoContent) {
                                api_handler(error::NoError);
                        } else if (status == http::StatusConflict) {
                                api_handler(
                                        MakeError(DeploymentAbortedError, "Could not send status update to server"));
                        } else {
                                auto ex_err_msg = api::ErrorMsgFromErrorResponse(*received_body);
                                string err_str;
                                if (ex_err_msg) {
                                        err_str = ex_err_msg.value();
                                } else {
                                        err_str = resp->GetStatusMessage();
                                }
                                api_handler(MakeError(
                                        BadResponseError,
                                        "Got unexpected response " + to_string(status)
                                                + " from status API: " + err_str));
                        }
                });
}

using mender::common::expected::ExpectedSize;

static ExpectedSize GetLogFileDataSize(const string &path) {
        auto ex_istr = io::OpenIfstream(path);
        if (!ex_istr) {
                return expected::unexpected(ex_istr.error());
        }
        auto istr = std::move(ex_istr.value());

        // We want the size of the actual data without a potential trailing
        // comma. So let's seek one byte before the end of file, check if the last
        // byte is a comma and return the appropriate number.
        istr.seekg(-1, ios_base::end);
        int c = istr.get();
        if (c == ',') {
                return istr.tellg() - static_cast<ifstream::off_type>(1);
        } else {
                return istr.tellg();
        }
}

// Find the beginning of the next log message JSON after offset
static ExpectedOffset FindNextMsgAfter(const string &path, ifstream::off_type offset) {
        auto ex_is = io::OpenIfstream(path);
        if (!ex_is) {
                return expected::unexpected(ex_is.error());
        }
        auto is = std::move(ex_is.value());
        is.seekg(offset);
        int io_errno = errno;
        if (!is) {
                return expected::unexpected(error::Error(
                        generic_category().default_error_condition(io_errno),
                        "Failed to seek to truncated logs offset in '" + path + "'"));
        }

        // Now that we have seeked to the starting offset, we need to find the next
        // boundary between JSON log entries.
        const string pattern = R"(},{"timestamp")";
        string buf(1024, '\0');
        while (is.read(buf.data(), 1024)) {
                // make sure we don't work with some stale data from the previous read()
                buf.resize(is.gcount());

                // XXX: This is not perfect as it can fail to find the next boundary if
                //      it's split between the end of the current buffer contents and
                //      the start of the next chunk read from the file. However, with a
                //      1K buffer, this is very unlikely to happen and even if it does
                //      happen, the logs will just be trimmed a bit more than
                //      necessary. For the sake of incomparably simpler code that is
                //      easy to test.
                auto pos = buf.find(pattern);
                if (pos != string::npos) {
                        offset += pos + 2; // skip "},"
                        break;
                }
                offset += buf.size();
        }
        io_errno = errno;
        if (!is && !is.eof()) {
                return expected::unexpected(error::Error(
                        generic_category().default_error_condition(io_errno),
                        "Failed to read logs from '" + path + "'"));
        }

        // In case we read the whole rest of the file not finding the next JSON log
        // entry, there must be something really wrong with the log and it should be
        // fully skipped. The user will still get the information that the log was
        // truncated and they will still have the full log on the device.
        return offset;
}

const vector<uint8_t> JsonLogMessagesReader::header_ = {
        '{', '"', 'm', 'e', 's', 's', 'a', 'g', 'e', 's', '"', ':', '['};
const vector<uint8_t> JsonLogMessagesReader::closing_ = {']', '}'};
const string JsonLogMessagesReader::default_tstamp_ = "1970-01-01T00:00:00.000000000Z";
const string JsonLogMessagesReader::bad_data_msg_tmpl_ =
        R"d({"timestamp": "1970-01-01T00:00:00.000000000Z", "level": "ERROR", "message": "(THE ORIGINAL LOGS CONTAINED INVALID ENTRIES)"},)d";
const string JsonLogMessagesReader::too_much_data_msg_tmpl_ =
        R"d({"timestamp": "1970-01-01T00:00:00.000000000Z", "level": "WARNING", "message": "(THE ORIGINAL LOGS WERE TOO BIG, THIS LOG IS TRUNCATED. The full log can be found on the device)"},)d";

JsonLogMessagesReader::~JsonLogMessagesReader() {
        reader_.reset();
        if (!sanitized_fpath_.empty() && path::FileExists(sanitized_fpath_)) {
                auto del_err = path::FileDelete(sanitized_fpath_);
                if (del_err != error::NoError) {
                        log::Error("Failed to delete auxiliary logs file: " + del_err.String());
                }
        }
        sanitized_fpath_.erase();
}

static error::Error DoSanitizeLogs(
        const string &orig_path, const string &new_path, bool &all_valid, string &first_tstamp) {
        auto ex_ifs = io::OpenIfstream(orig_path);
        if (!ex_ifs) {
                return ex_ifs.error();
        }
        auto ex_ofs = io::OpenOfstream(new_path);
        if (!ex_ofs) {
                return ex_ofs.error();
        }
        auto &ifs = ex_ifs.value();
        auto &ofs = ex_ofs.value();

        string last_known_tstamp = first_tstamp;
        const string tstamp_prefix_data = R"d({"timestamp": ")d";
        const string corrupt_msg_suffix_data =
                R"d(", "level": "ERROR", "message": "(CORRUPTED LOG DATA)"},)d";

        string line;
        first_tstamp.erase();
        all_valid = true;
        error::Error err;
        while (!ifs.eof()) {
                getline(ifs, line);
                if (!ifs.eof() && !ifs) {
                        int io_errno = errno;
                        return error::Error(
                                generic_category().default_error_condition(io_errno),
                                "Failed to get line from deployment logs file '" + orig_path
                                        + "': " + strerror(io_errno));
                }
                if (line.empty()) {
                        // skip empty lines
                        continue;
                }
                auto ex_json = json::Load(line);
                if (ex_json) {
                        // valid JSON log line, just replace the newline after it with a comma and save the
                        // timestamp for later
                        auto ex_tstamp = ex_json.value().Get("timestamp").and_then(json::ToString);
                        if (ex_tstamp) {
                                if (first_tstamp.empty()) {
                                        first_tstamp = ex_tstamp.value();
                                }
                                last_known_tstamp = std::move(ex_tstamp.value());
                        }
                        line.append(1, ',');
                        err = io::WriteStringIntoOfstream(ofs, line);
                        if (err != error::NoError) {
                                return err.WithContext("Failed to write pre-processed deployment logs data");
                        }
                } else {
                        all_valid = false;
                        if (first_tstamp.empty()) {
                                // If we still don't have the first valid tstamp, we need to
                                // save the last known one (potentially pre-set) as the first
                                // one.
                                first_tstamp = last_known_tstamp;
                        }
                        err = io::WriteStringIntoOfstream(
                                ofs, tstamp_prefix_data + last_known_tstamp + corrupt_msg_suffix_data);
                        if (err != error::NoError) {
                                return err.WithContext("Failed to write pre-processed deployment logs data");
                        }
                }
        }
        return error::NoError;
}

static void ReplaceTimestampInMsgData(
        vector<uint8_t> &msg_data, string &timestamp, size_t default_tstamp_size) {
        auto msg_data_tstamp_start = msg_data.begin() + 15; // len(R"({"timestamp": ")")

        // The actual timestamp from logs can potentially have a different
        // (likely lower) time resolution and thus length than our default.
        const auto timestamp_size = timestamp.size();
        if (timestamp_size > default_tstamp_size) {
                // In case the time resolution is higher and the timestamp
                // longer (unlikely to happen)
                if (timestamp[timestamp_size - 1] == 'Z') {
                        timestamp[default_tstamp_size - 1] = 'Z';
                }
                timestamp.resize(default_tstamp_size);
        }
        copy_n(timestamp.cbegin(), timestamp.size(), msg_data_tstamp_start);
        if (timestamp.size() < default_tstamp_size) {
                // Add a closing '"' right after the timestamp and fill in the
                // rest of the space in the template with spaces that have no
                // effect in JSON.
                msg_data_tstamp_start[timestamp.size()] = '"';
                for (auto it = msg_data_tstamp_start + timestamp.size() + 1;
                         it < msg_data_tstamp_start + default_tstamp_size + 1;
                         it++) {
                        *it = ' ';
                }
        }
}

error::Error JsonLogMessagesReader::SanitizeLogs() {
        if (!sanitized_fpath_.empty()) {
                return error::NoError;
        }

        string prep_fpath = log_fpath_ + ".sanitized";
        string first_tstamp = default_tstamp_;
        auto err = DoSanitizeLogs(log_fpath_, prep_fpath, clean_logs_, first_tstamp);
        if (err != error::NoError) {
                if (path::FileExists(prep_fpath)) {
                        auto del_err = path::FileDelete(prep_fpath);
                        if (del_err != error::NoError) {
                                log::Error("Failed to delete auxiliary logs file: " + del_err.String());
                        }
                }
        } else {
                sanitized_fpath_ = std::move(prep_fpath);
                reader_ = make_unique<io::FileReader>(sanitized_fpath_);
                auto ex_sz = GetLogFileDataSize(sanitized_fpath_);
                if (!ex_sz) {
                        return ex_sz.error().WithContext("Failed to determine deployment logs size");
                }

                raw_data_size_ = ex_sz.value();
                if (raw_data_size_ > maximum_log_size_) {
                        large_logs_ = true;
                        // Make sure we end up with less data than the limit with all the
                        // potential extra messages added in JsonLogMessagesReader::Read()
                        // below.
                        auto ex_off = FindNextMsgAfter(
                                sanitized_fpath_,
                                (raw_data_size_ + too_much_data_msg_tmpl_.size() + bad_data_msg_tmpl_.size()
                                 - maximum_log_size_));
                        if (!ex_off) {
                                return ex_off.error().WithContext(
                                        "Failed to determine start offset in too large deployment logs");
                        }
                        reader_ = make_unique<io::FileReader>(sanitized_fpath_, ex_off.value());
                        raw_data_size_ -= ex_off.value();
                }
                rem_raw_data_size_ = raw_data_size_;
                if (!clean_logs_) {
                        ReplaceTimestampInMsgData(bad_data_msg_, first_tstamp, default_tstamp_.size());
                }
                if (large_logs_) {
                        ReplaceTimestampInMsgData(too_much_data_msg_, first_tstamp, default_tstamp_.size());
                }
        }
        return err;
}

error::Error JsonLogMessagesReader::Rewind() {
        AssertOrReturnError(!sanitized_fpath_.empty());
        header_rem_ = header_.size();
        closing_rem_ = closing_.size();
        bad_data_msg_rem_ = bad_data_msg_.size();
        too_much_data_msg_rem_ = too_much_data_msg_.size();

        // release/close the file first so that the FileDelete() below can actually
        // delete it and free space up
        reader_.reset();
        auto del_err = path::FileDelete(sanitized_fpath_);
        if (del_err != error::NoError) {
                log::Error("Failed to delete auxiliary logs file: " + del_err.String());
        }
        sanitized_fpath_.erase();
        return SanitizeLogs();
}

int64_t JsonLogMessagesReader::TotalDataSize() {
        assert(!sanitized_fpath_.empty());

        auto ret = raw_data_size_ + header_.size() + closing_.size();
        if (!clean_logs_) {
                ret += bad_data_msg_.size();
        }
        if (large_logs_) {
                ret += too_much_data_msg_.size();
        }
        return ret;
}

ExpectedSize JsonLogMessagesReader::Read(
        vector<uint8_t>::iterator start, vector<uint8_t>::iterator end) {
        AssertOrReturnUnexpected(!sanitized_fpath_.empty());

        if (header_rem_ > 0) {
                io::Vsize target_size = end - start;
                auto copy_end = copy_n(
                        header_.begin() + (header_.size() - header_rem_), min(header_rem_, target_size), start);
                auto n_copied = copy_end - start;
                header_rem_ -= n_copied;
                return static_cast<size_t>(n_copied);
        } else if (large_logs_ && (too_much_data_msg_rem_ > 0)) {
                io::Vsize target_size = end - start;
                auto copy_end = copy_n(
                        too_much_data_msg_.begin() + (too_much_data_msg_.size() - too_much_data_msg_rem_),
                        min(too_much_data_msg_rem_, target_size),
                        start);
                auto n_copied = copy_end - start;
                too_much_data_msg_rem_ -= n_copied;
                return static_cast<size_t>(n_copied);
        } else if (!clean_logs_ && (bad_data_msg_rem_ > 0)) {
                io::Vsize target_size = end - start;
                auto copy_end = copy_n(
                        bad_data_msg_.begin() + (bad_data_msg_.size() - bad_data_msg_rem_),
                        min(bad_data_msg_rem_, target_size),
                        start);
                auto n_copied = copy_end - start;
                bad_data_msg_rem_ -= n_copied;
                return static_cast<size_t>(n_copied);
        } else if (rem_raw_data_size_ > 0) {
                if (end - start > rem_raw_data_size_) {
                        end = start + static_cast<size_t>(rem_raw_data_size_);
                }
                auto ex_sz = reader_->Read(start, end);
                if (!ex_sz) {
                        return ex_sz;
                }
                auto n_read = ex_sz.value();
                rem_raw_data_size_ -= n_read;

                // We control how much we read from the file so we should never read
                // 0 bytes (meaning EOF reached). If we do, it means the file is
                // smaller than what we were told.
                assert(n_read > 0);
                if (n_read == 0) {
                        return expected::unexpected(
                                MakeError(InvalidDataError, "Unexpected EOF when reading logs file"));
                }
                return n_read;
        } else if (closing_rem_ > 0) {
                io::Vsize target_size = end - start;
                auto copy_end = copy_n(
                        closing_.begin() + (closing_.size() - closing_rem_),
                        min(closing_rem_, target_size),
                        start);
                auto n_copied = copy_end - start;
                closing_rem_ -= n_copied;
                return static_cast<size_t>(copy_end - start);
        } else {
                return 0;
        }
};

static const string logs_uri_suffix = "/log";

error::Error DeploymentClient::PushLogs(
        const string &deployment_id,
        const string &log_file_path,
        api::Client &client,
        LogsAPIResponseHandler api_handler) {
        auto logs_reader = make_shared<JsonLogMessagesReader>(log_file_path);
        auto err = logs_reader->SanitizeLogs();
        if (err != error::NoError) {
                return err;
        }

        auto req = make_shared<api::APIRequest>();
        req->SetPath(http::JoinUrl(deployments_uri_prefix, deployment_id, logs_uri_suffix));
        req->SetMethod(http::Method::PUT);
        req->SetHeader("Content-Type", "application/json");
        req->SetHeader("Content-Length", to_string(logs_reader->TotalDataSize()));
        req->SetHeader("Accept", "application/json");
        req->SetBodyGenerator([logs_reader]() {
                logs_reader->Rewind();
                return logs_reader;
        });

        auto received_body = make_shared<vector<uint8_t>>();
        return client.AsyncCall(
                req,
                [received_body, api_handler](http::ExpectedIncomingResponsePtr exp_resp) {
                        if (!exp_resp) {
                                log::Error("Request to push logs data failed: " + exp_resp.error().message);
                                api_handler(exp_resp.error());
                                return;
                        }

                        auto body_writer = make_shared<io::ByteWriter>(received_body);
                        auto resp = exp_resp.value();
                        auto content_length = resp->GetHeader("Content-Length");
                        if (!content_length) {
                                log::Debug(
                                        "Failed to get content length from the deployment log API response headers: "
                                        + content_length.error().String());
                                body_writer->SetUnlimited(true);
                        } else {
                                auto ex_len = common::StringTo<size_t>(content_length.value());
                                if (!ex_len) {
                                        log::Error(
                                                "Failed to convert the content length from the deployment log API response headers to an integer: "
                                                + ex_len.error().String());
                                        body_writer->SetUnlimited(true);
                                } else {
                                        received_body->resize(ex_len.value());
                                }
                        }
                        resp->SetBodyWriter(body_writer);
                },
                [received_body, api_handler](http::ExpectedIncomingResponsePtr exp_resp) {
                        if (!exp_resp) {
                                log::Error("Request to push logs data failed: " + exp_resp.error().message);
                                api_handler(exp_resp.error());
                                return;
                        }

                        auto resp = exp_resp.value();
                        auto status = resp->GetStatusCode();
                        if (status == http::StatusNoContent) {
                                api_handler(error::NoError);
                        } else {
                                auto ex_err_msg = api::ErrorMsgFromErrorResponse(*received_body);
                                string err_str;
                                if (ex_err_msg) {
                                        err_str = ex_err_msg.value();
                                } else {
                                        err_str = resp->GetStatusMessage();
                                }
                                api_handler(MakeError(
                                        BadResponseError,
                                        "Got unexpected response " + to_string(status) + " from logs API: " + err_str));
                        }
                });
}

} // namespace deployments
} // namespace update
} // namespace mender

mendersoftware / mender / 2420780216

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