如何解决wkhtmltopdf rotativa ASP.NET Core MVC 问题
我正在使用使用 Ubuntu 18.04 LTS 的数字海洋水滴,并在其上部署了我的 ASP.NET Core 5.0 MVC 项目,一切正常。我试图在其上安装 rotativa 以打印 pdf 文档,但我无法完成这项工作。
我按照以下步骤操作:https://blog.elmah.io/generate-a-pdf-from-asp-net-core-for-free/
但是在尝试打印 pdf 时出现此错误:
异常:QPainter::begin():由于未知错误,返回错误退出,代码为 1。
我的 Startup.cs 中有这个:
using Wkhtmltopdf.NetCore;
namespace farmamest
{
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
// services.AddControllersWithViews();
services.AddRazorPages();
services.Configure<ForwardedHeadersOptions>(options =>
{
options.KNownProxies.Add(IPAddress.Parse("10.0.0.100"));
});
services.AddDefaultIdentity<IdentityUser>(options => options.SignIn.RequireConfirmedAccount = false)
.AddRoles<IdentityRole>()
.AddEntityFrameworkStores<Context>();
services.AddControllersWithViews();
services.Configure<IdentityOptions>(options =>
{
// Password settings.
options.Password.requiredigit = false;
options.Password.RequireLowercase = false;
options.Password.RequireNonAlphanumeric = false;
options.Password.RequireUppercase = false;
options.Password.requiredLength = 6;
options.Password.requiredUniqueChars = 1;
// Lockout settings.
options.Lockout.DefaultLockoutTimeSpan = TimeSpan.FromMinutes(15);
//options.Lockout.MaxFailedAccessAttempts = 5;
options.Lockout.AllowedForNewUsers = true;
// Default SignIn settings.
options.SignIn.RequireConfirmedEmail = false;
options.SignIn.RequireConfirmedPhoneNumber = false;
// User settings.
options.User.AllowedUserNameCharacters =
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMnopQRSTUVWXYZ0123456789-._@+";
options.User.RequireUniqueEmail = true;
});
services.ConfigureApplicationCookie(options =>
{
// Cookie settings
// options.Cookie.Name = Configuration["CookieName"];
options.Cookie.HttpOnly = true;
options.ExpireTimeSpan = TimeSpan.FromMinutes(5);
options.LoginPath = "/Identity/Account/Login";
options.AccessDeniedpath = "/Identity/Account/AccessDenied";
options.ReturnUrlParameter = CookieAuthenticationDefaults.ReturnUrlParameter;
options.SlidingExpiration = true;
});
services.Configure<CookiePolicyOptions>(options =>
{
// This lambda determines whether user consent for non-essential cookies is needed for a given request.
options.CheckConsentNeeded = context => true;
// options.MinimumSameSitePolicy = SameSiteMode.None;
});
services.AddMvc(config =>
{
// var policy = new AuthorizationPolicyBuilder()
// .RequireAuthenticatedUser()
// .Build();
// config.Filters.Add(new Authorizefilter(policy));
});
services.Configure<PasswordHasherOptions>(option =>
{
option.IterationCount = 12000;
});
services.AddWkhtmltopdf("Rotativa");
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app,IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
// app.UseMigrationsEndPoint();
}
else
{
app.UseExceptionHandler("/Error");
// The default HSTS value is 30 days. You may want to change this for production scenarios,see https://aka.ms/aspnetcore-hsts.
app.UseHsts();
}
app.UseForwardedHeaders(new ForwardedHeadersOptions
{
ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto
});
app.UseHttpsRedirection();
app.UseStaticFiles();
//cookie policy
app.UseCookiePolicy();
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
app.UseDefaultFiles();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllerRoute(
name: "default",pattern: "{controller=Home}/{action=Index}/{id?}");
endpoints.MapRazorPages();
});
}
}
}
我将文件保存在 <foldername>/<projectname>/bin/Debug/net5.0/Rotativa
我如何使这项工作?这个版本的网络问题相关吗?我用的是net5.0,网上找不到解决办法,头疼。
解决方法
这是 .NET 5 的问题。看起来与调用 Wkhtmltopdf 相关。
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