base/log/dump_log.cpp

/*
 * Copyright (c) 2021-2022 Huawei Device Co., Ltd.
 * 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 "base/log/dump_log.h"

#include <fstream>

#if defined(OHOS_PLATFORM)
#include "zlib.h"
#endif

#include "core/common/ace_application_info.h"

namespace OHOS::Ace {

#define CHUNK 16384

#define COMPRESS_VERSION 9

DumpLog::DumpLog() = default;
DumpLog::~DumpLog() = default;

void DumpLog::Print(int32_t depth, const std::string& className, int32_t childSize)
{
    if (!ostream_ || !ostream_->good()) {
        return;
    }
    std::string space = "  ";
    for (int32_t i = 0; i < depth; ++i) {
        ostream_->write(space.c_str(), space.length());
    }
    ostream_->write(space.c_str(), space.length());
    std::string data = "|-> ";
    data.append(className);
    data.append(" childSize:" + std::to_string(childSize));
    data.append("\n");
    ostream_->write(data.c_str(), data.length());
    for (auto& desc : description_) {
        for (int32_t i = 0; i < depth; ++i) {
            ostream_->write(space.c_str(), space.length());
        }
        std::string data = "";
        if (childSize == 0) {
            data = "      ";
        } else {
            data = "    | ";
        }
        data.append(desc);
        ostream_->write(data.c_str(), data.length());
    }
    ostream_->flush();
    description_.clear();
    description_.shrink_to_fit();
}

void DumpLog::Print(const std::string& content)
{
    Print(0, content);
}

void DumpLog::Print(int32_t depth, const std::string& content)
{
    std::string space = " ";
    for (int32_t i = 0; i < depth; ++i) {
        ostream_->write(space.c_str(), space.length());
    }
    std::string data = content + separator_;
    ostream_->write(data.c_str(), data.length());
}

void DumpLog::Reset()
{
    ostream_.reset();
}

void DumpLog::ShowDumpHelp(std::vector<std::string>& info)
{
    info.emplace_back(" -element                       |show element tree");
    info.emplace_back(" -render                        |show render tree");
    info.emplace_back(" -inspector                     |show inspector tree");
    info.emplace_back(" -frontend                      |show path and components count of current page");
    info.emplace_back(" -navigation                    |show navigation path stack");
}

void DumpLog::Append(int32_t depth, const std::string& className, int32_t childSize)
{
    for (int32_t i = 0; i < depth; ++i) {
        result_.append("  ");
    }
    result_.append("|-> ");
    result_.append(className);
    result_.append(" childSize:" + std::to_string(childSize));
    result_.append("\n");
    for (auto& desc : description_) {
        for (int32_t i = 0; i < depth; ++i) {
            result_.append("  ");
        }
        if (childSize == 0) {
            result_.append("      ");
        } else {
            result_.append("    | ");
        }
        result_.append(desc);
    }
    description_.clear();
    description_.shrink_to_fit();
}

bool DumpLog::OutPutBySize()
{
    if (!ostream_->good()) {
        result_.clear();
        return false;
    }
    // if current result size > max size, dump will output as file
    if (result_.size() + 1 > DumpLog::MAX_DUMP_LENGTH) {
        auto dumpFilePath = AceApplicationInfo::GetInstance().GetDataFileDirPath() + "/arkui.dump";
        std::unique_ptr<std::ostream> ostream = std::make_unique<std::ofstream>(dumpFilePath);
        if (!ostream) {
            result_.clear();
            result_.append("Dump output failed,please try again");
            ostream_->write(result_.c_str(), result_.length());
            result_.clear();
        }
        CHECK_NULL_RETURN(ostream, false);
        DumpLog::GetInstance().SetDumpFile(std::move(ostream));
    }
    ostream_->write(result_.c_str(), result_.length());
    result_.clear();
    ostream_->flush();
    return true;
}

void DumpLog::OutPutDefault()
{
    if (!ostream_ || !ostream_->good()) {
        result_.clear();
        return;
    }
    ostream_->write(result_.c_str(), result_.length());
    result_.clear();
    ostream_->flush();
}

void DumpLog::PrintJson(const std::string& content)
{
    if (!ostream_->good()) {
        return;
    }
    ostream_->write(content.c_str(), content.length());
    ostream_->flush();
}

void DumpLog::PrintEndDumpInfoNG(bool isElement)
{
    int32_t depth = GetDepth() + DumpLog::END_POS_TWO;
    std::string result;
    for (int32_t i = 0; i < depth; ++i) {
        result.append("}");
    }
    if (isElement) {
        Append(result);
    } else {
        PrintJson(result);
    }
}

std::string DumpLog::GetPrefix(int32_t depth)
{
    std::string prefix = "";
    if (depth > 0) {
        int32_t lastDepth = GetDepth();
        if (depth == lastDepth) {
            prefix.append("},");
        } else if (depth > lastDepth) {
            prefix = ",";
        } else {
            int32_t diff = lastDepth - depth + 1;
            prefix.assign(diff, '}').append(",");
        }
    }
    SetDepth(depth);
    return prefix;
}

std::string DumpLog::FormatDumpInfo(const std::string& str, int32_t depth)
{
    if (str.length() > DumpLog::MIN_JSON_LENGTH) {
        if (depth == 0) {
            return str.substr(0, str.length() - DumpLog::END_POS_TWO);
        }
        return str.substr(1, str.length() - DumpLog::END_POS_THREE);
    }
    return str;
}

#if defined(OHOS_PLATFORM)
int DumpLog::CompressString(const char* in_str, size_t in_len, std::string& out_str, int level)
{
    if (!in_str)
        return Z_DATA_ERROR;

    int ret, flush;
    unsigned have;
    z_stream strm;

    unsigned char out[CHUNK];

    /* allocate deflate state */
    strm.zalloc = Z_NULL;
    strm.zfree = Z_NULL;
    strm.opaque = Z_NULL;
    ret = deflateInit(&strm, level);
    if (ret != Z_OK)
        return ret;

    std::shared_ptr<z_stream> sp_strm(&strm, [](z_stream* strm) { (void)deflateEnd(strm); });
    const char* end = in_str + in_len;

    size_t distance = 0;
    /* compress until end of file */
    do {
        distance = end - in_str;
        strm.avail_in = (distance >= CHUNK) ? CHUNK : distance;
        strm.next_in = (Bytef*)in_str;
        in_str += strm.avail_in;
        flush = (in_str == end) ? Z_FINISH : Z_NO_FLUSH;
        do {
            strm.avail_out = CHUNK;
            strm.next_out = out;
            ret = deflate(&strm, flush);
            if (ret == Z_STREAM_ERROR)
                break;
            have = CHUNK - strm.avail_out;
            out_str.append((const char*)out, have);
        } while (strm.avail_out == 0);
        if (strm.avail_in != 0) {
            break;
        }
    } while (flush != Z_FINISH);
    if (ret != Z_STREAM_END)
        return Z_STREAM_ERROR;
    return Z_OK;
}
#endif

void DumpLog::OutPutByCompress()
{
    if (!ostream_ || !ostream_->good()) {
        result_.clear();
        return;
    }
    std::string compressString;
#if defined(OHOS_PLATFORM)
    if (CompressString(result_.c_str(), result_.size(), compressString, COMPRESS_VERSION) == Z_OK) {
        ostream_->write(compressString.c_str(), compressString.length());
    } else {
        ostream_->write(result_.c_str(), result_.length());
    }
#else
    ostream_->write(result_.c_str(), result_.length());
#endif
    result_.clear();
    ostream_->flush();
}
} // namespace OHOS::Ace