C++ web框架 Paozhu 1.14.0 发布，html 生成 pdf 文件，xlsx 文件读写
### C++ web框架 Paozhu 1.14.0 发布
C++ web框架 Paozhu 1.14.0 发布，加入了 HTML 生成 PDF 文件的功能，目前全球几乎是唯一的 C++ 语言开源项目，速度非常快，自带图像处理功能，二维码模块为内置，不需要第三方库，因为 Paozhu 已经有了自己原生的图像处理类，目前支持 jpg 和 png 格式的图片，足以满足常规 web 开发的需求。
Paozhu 的子项目 webpdf 是一个 html、svg、images 生成 PDF 的功能，灵感来自 fpdf.php，重构为 C++ 代码，并且支持 ttf 和 otf 字体，同时进行了程序优化。
### 增加 Excel xlsx 读写功能
增加了 Excel xlst 的读写程序，可以实现 Excel 的读写功能，目前测试支持 Office 2006、macOS Number 和 LibreOffice 生成的 xlsx 格式。
### HTML 转 PDF 文件例子
```cpp
#include "httppeer.h"
#include "serverconfig.h"
#include "server_localvar.h"
#include "test_webpdf.h"
#include "func.h"
#include <memory>
#include <string>
#ifdef ENABLE_PDF
#include "webpdf.h"
#endif// ENABLE_PDF
namespace http
{
namespace fs = std::filesystem;
//@urlpath(null,test_webpdf)
std::string test_webpdf(std::shared_ptr<httppeer> peer)
{
httppeer &client = peer->get_peer();
#ifdef ENABLE_PDF
server_loaclvar &static_server_var = get_server_global_var();
if (static_server_var.config_path.size() < 5)
{
client << "<p> static_server_var.config_path empty </p>";
return "";
}
std::string file_conf = dir_name(static_server_var.config_path);
if (file_conf.size() > 0 && file_conf.back() != '/')
{
file_conf.push_back('/');
}
file_conf.append("docs/");
if(peer->pathinfos.size() == 2 && peer->pathinfos[1] == "cn")
{
try
{
std::string html_file = file_conf + "webpdf_tutorial.html";
std::string pdf_file = file_conf + "webpdf_tutorial.pdf";
std::string font_file = "AlibabaPuHuiTi-Light.otf";
std::string font_name = "AlibabaPuHuiTi-Light";
fs::path html_path = fs::absolute(html_file);
fs::path pdf_path = fs::absolute(pdf_file);
fs::path font_dir = fs::absolute(file_conf + "font");
std::ifstream f(html_file, std::ios::binary);
if (!f.is_open())
{
client << "Cannot open file: " << html_file;
return "";
}
// 获取文件大小
f.seekg(0, std::ios::end);
std::streamsize size = f.tellg();
f.seekg(0, std::ios::beg);
std::string html;
html.resize(static_cast<size_t>(size));
if (size > 0 && !f.read(html.data(), size)) {
client << "Failed to read file: " << html_file;
return "";
}
auto pdf = std::make_unique<pz::webpdf>();
pdf->setImagesPath(file_conf);
pdf->AddPage();
pdf->AddFont(font_name,"",font_file,font_dir.string());
pdf->SetFont(font_name,"",14);
fs::current_path(fs::absolute(html_file).parent_path());
pdf->WriteHTML(html);
peer->type("application/pdf");
pdf->Output("F", pdf_path.string());
peer->output = pdf->Output("D", pdf_path.string());
//peer->output = pdf->move_result();
} catch (const std::exception& e) {
client << "Error: " << e.what();
return "";
}
}
else
{
try
{
std::string html_file = file_conf + "webpdf_tutorial_en.html";
std::string pdf_file = file_conf + "webpdf_tutorial_en.pdf";
std::string font_file = "AlibabaSans-Regular.otf";
std::string font_name = "AlibabaSans-Regular";
fs::path html_path = fs::absolute(html_file);
fs::path pdf_path = fs::absolute(pdf_file);
fs::path font_dir = fs::absolute(file_conf + "font");
std::ifstream f(html_file, std::ios::binary);
if (!f.is_open())
{
client << "Cannot open file: " << html_file;
return "";
}
// 获取文件大小
f.seekg(0, std::ios::end);
std::streamsize size = f.tellg();
f.seekg(0, std::ios::beg);
std::string html;
html.resize(static_cast<size_t>(size));
if (size > 0 && !f.read(html.data(), size)) {
client << "Failed to read file: " << html_file;
return "";
}
auto pdf = std::make_unique<pz::webpdf>();
pdf->setImagesPath(file_conf);
pdf->AddFont(font_name, "", font_file, font_dir.string());
pdf->SetFont(font_name, "", 14);
pdf->WriteHTML(html);
peer->type("application/pdf");
pdf->Output("F", pdf_path.string());
peer->output = pdf->Output("D", pdf_path.string());
//peer->output = pdf->move_result();
} catch (const std::exception& e) {
std::cerr << "Error: " << e.what() << std::endl;
return "";
}
}
#else
client << "<p>Please: cmake .. -DENABLE_PDF=ON </p>";
#endif// ENABLE_PDF
return "";
}
//@urlpath(null,test_ttfpdf)
std::string test_otfpdf(std::shared_ptr<httppeer> peer)
{
httppeer &client = peer->get_peer();
#ifdef ENABLE_PDF
// ...
#endif// ENABLE_PDF
}
```
### Excel xlsx 读写程序例子
```cpp
#include "httppeer.h"
#include "serverconfig.h"
#include "server_localvar.h"
#include "test_pzexcel.h"
#include "func.h"
#include <memory>
#include <string>
#ifdef ENABLE_EXCEL
#include "pzexcel.h"
#endif// ENABLE_EXCEL
namespace http
{
//@urlpath(null,test_pzexcel)
std::string test_pzexcel(std::shared_ptr<httppeer> peer)
{
httppeer &client = peer->get_peer();
#ifdef ENABLE_EXCEL
// ...
#endif// ENABLE_EXCEL
}
}
```
### 二维码生成例子
```cpp
#include <chrono>
#include <thread>
#include "httppeer.h"
#include <filesystem>
#ifdef ENABLE_IMAGE
#include "qrcode.h"
#include "pzpng.h"
#endif
#include "testqrcode.h"
namespace http
{
//@urlpath(null,testqrcode)
std::string testqrcode(std::shared_ptr<httppeer> peer)
{
httppeer &client = peer->get_peer();
std::string atxt = client.post["qrcontent"].to_string();
if (atxt.size() == 0)
{
atxt = "qrsting hello world !";
}
client << "<p>" << atxt << "</p>";
#ifdef ENABLE_IMAGE
// ...
#endif
}
}
```
---
原文链接：[点击查看](https://www.oschina.net/news/476009)
C++ web框架 Paozhu 1.14.0 发布，加入了 HTML 生成 PDF 文件的功能，目前全球几乎是唯一的 C++ 语言开源项目，速度非常快，自带图像处理功能，二维码模块为内置，不需要第三方库，因为 Paozhu 已经有了自己原生的图像处理类，目前支持 jpg 和 png 格式的图片，足以满足常规 web 开发的需求。
Paozhu 的子项目 webpdf 是一个 html、svg、images 生成 PDF 的功能，灵感来自 fpdf.php，重构为 C++ 代码，并且支持 ttf 和 otf 字体，同时进行了程序优化。
### 增加 Excel xlsx 读写功能
增加了 Excel xlst 的读写程序，可以实现 Excel 的读写功能，目前测试支持 Office 2006、macOS Number 和 LibreOffice 生成的 xlsx 格式。
### HTML 转 PDF 文件例子
```cpp
#include "httppeer.h"
#include "serverconfig.h"
#include "server_localvar.h"
#include "test_webpdf.h"
#include "func.h"
#include <memory>
#include <string>
#ifdef ENABLE_PDF
#include "webpdf.h"
#endif// ENABLE_PDF
namespace http
{
namespace fs = std::filesystem;
//@urlpath(null,test_webpdf)
std::string test_webpdf(std::shared_ptr<httppeer> peer)
{
httppeer &client = peer->get_peer();
#ifdef ENABLE_PDF
server_loaclvar &static_server_var = get_server_global_var();
if (static_server_var.config_path.size() < 5)
{
client << "<p> static_server_var.config_path empty </p>";
return "";
}
std::string file_conf = dir_name(static_server_var.config_path);
if (file_conf.size() > 0 && file_conf.back() != '/')
{
file_conf.push_back('/');
}
file_conf.append("docs/");
if(peer->pathinfos.size() == 2 && peer->pathinfos[1] == "cn")
{
try
{
std::string html_file = file_conf + "webpdf_tutorial.html";
std::string pdf_file = file_conf + "webpdf_tutorial.pdf";
std::string font_file = "AlibabaPuHuiTi-Light.otf";
std::string font_name = "AlibabaPuHuiTi-Light";
fs::path html_path = fs::absolute(html_file);
fs::path pdf_path = fs::absolute(pdf_file);
fs::path font_dir = fs::absolute(file_conf + "font");
std::ifstream f(html_file, std::ios::binary);
if (!f.is_open())
{
client << "Cannot open file: " << html_file;
return "";
}
// 获取文件大小
f.seekg(0, std::ios::end);
std::streamsize size = f.tellg();
f.seekg(0, std::ios::beg);
std::string html;
html.resize(static_cast<size_t>(size));
if (size > 0 && !f.read(html.data(), size)) {
client << "Failed to read file: " << html_file;
return "";
}
auto pdf = std::make_unique<pz::webpdf>();
pdf->setImagesPath(file_conf);
pdf->AddPage();
pdf->AddFont(font_name,"",font_file,font_dir.string());
pdf->SetFont(font_name,"",14);
fs::current_path(fs::absolute(html_file).parent_path());
pdf->WriteHTML(html);
peer->type("application/pdf");
pdf->Output("F", pdf_path.string());
peer->output = pdf->Output("D", pdf_path.string());
//peer->output = pdf->move_result();
} catch (const std::exception& e) {
client << "Error: " << e.what();
return "";
}
}
else
{
try
{
std::string html_file = file_conf + "webpdf_tutorial_en.html";
std::string pdf_file = file_conf + "webpdf_tutorial_en.pdf";
std::string font_file = "AlibabaSans-Regular.otf";
std::string font_name = "AlibabaSans-Regular";
fs::path html_path = fs::absolute(html_file);
fs::path pdf_path = fs::absolute(pdf_file);
fs::path font_dir = fs::absolute(file_conf + "font");
std::ifstream f(html_file, std::ios::binary);
if (!f.is_open())
{
client << "Cannot open file: " << html_file;
return "";
}
// 获取文件大小
f.seekg(0, std::ios::end);
std::streamsize size = f.tellg();
f.seekg(0, std::ios::beg);
std::string html;
html.resize(static_cast<size_t>(size));
if (size > 0 && !f.read(html.data(), size)) {
client << "Failed to read file: " << html_file;
return "";
}
auto pdf = std::make_unique<pz::webpdf>();
pdf->setImagesPath(file_conf);
pdf->AddFont(font_name, "", font_file, font_dir.string());
pdf->SetFont(font_name, "", 14);
pdf->WriteHTML(html);
peer->type("application/pdf");
pdf->Output("F", pdf_path.string());
peer->output = pdf->Output("D", pdf_path.string());
//peer->output = pdf->move_result();
} catch (const std::exception& e) {
std::cerr << "Error: " << e.what() << std::endl;
return "";
}
}
#else
client << "<p>Please: cmake .. -DENABLE_PDF=ON </p>";
#endif// ENABLE_PDF
return "";
}
//@urlpath(null,test_ttfpdf)
std::string test_otfpdf(std::shared_ptr<httppeer> peer)
{
httppeer &client = peer->get_peer();
#ifdef ENABLE_PDF
// ...
#endif// ENABLE_PDF
}
```
### Excel xlsx 读写程序例子
```cpp
#include "httppeer.h"
#include "serverconfig.h"
#include "server_localvar.h"
#include "test_pzexcel.h"
#include "func.h"
#include <memory>
#include <string>
#ifdef ENABLE_EXCEL
#include "pzexcel.h"
#endif// ENABLE_EXCEL
namespace http
{
//@urlpath(null,test_pzexcel)
std::string test_pzexcel(std::shared_ptr<httppeer> peer)
{
httppeer &client = peer->get_peer();
#ifdef ENABLE_EXCEL
// ...
#endif// ENABLE_EXCEL
}
}
```
### 二维码生成例子
```cpp
#include <chrono>
#include <thread>
#include "httppeer.h"
#include <filesystem>
#ifdef ENABLE_IMAGE
#include "qrcode.h"
#include "pzpng.h"
#endif
#include "testqrcode.h"
namespace http
{
//@urlpath(null,testqrcode)
std::string testqrcode(std::shared_ptr<httppeer> peer)
{
httppeer &client = peer->get_peer();
std::string atxt = client.post["qrcontent"].to_string();
if (atxt.size() == 0)
{
atxt = "qrsting hello world !";
}
client << "<p>" << atxt << "</p>";
#ifdef ENABLE_IMAGE
// ...
#endif
}
}
```
---
原文链接：[点击查看](https://www.oschina.net/news/476009)
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