Docker + .NET Core 2.0 + Https Images

[mike-dube]

I'm currently running DinkToPdf on my macOS without any problem.

My webpages use external HTTPS ressources such as

• two images
• 1 CSS file

In Docker, using a asp-net-2.0 base image (along with added-dependencies

apt-get install -y --no-install-recommends zlib1g fontconfig libfreetype6 libx11-6 libxext6 libxrender1

For some reason, the PDF rendered has no image, and no CSS.

How can I fix this?

[mike-dube]

Docker reports

QSslSocket: cannot resolve CRYPTO_num_locks QSslSocket: cannot resolve CRYPTO_set_id_callback QSslSocket: cannot resolve CRYPTO_set_locking_callback QSslSocket: cannot resolve sk_free QSslSocket: cannot resolve sk_num QSslSocket: cannot resolve sk_pop_free QSslSocket: cannot resolve sk_value QSslSocket: cannot resolve SSL_library_init QSslSocket: cannot resolve SSL_load_error_strings QSslSocket: cannot resolve SSLv3_client_method QSslSocket: cannot resolve SSLv23_client_method QSslSocket: cannot resolve SSLv3_server_method QSslSocket: cannot resolve SSLv23_server_method QSslSocket: cannot resolve X509_STORE_CTX_get_chain QSslSocket: cannot resolve OPENSSL_add_all_algorithms_noconf QSslSocket: cannot resolve OPENSSL_add_all_algorithms_conf QSslSocket: cannot resolve SSLeay QSslSocket: cannot call unresolved function CRYPTO_num_locks QSslSocket: cannot call unresolved function CRYPTO_set_id_callback QSslSocket: cannot call unresolved function CRYPTO_set_locking_callback QSslSocket: cannot call unresolved function SSL_library_init QSslSocket: cannot call unresolved function SSLv23_client_method QSslSocket: cannot call unresolved function sk_num QSslSocket: cannot call unresolved function SSLv23_client_method QSslSocket: cannot call unresolved function SSL_library_init QSslSocket: cannot call unresolved function SSLv23_client_method QSslSocket: cannot call unresolved function SSL_library_init QSslSocket: cannot call unresolved function SSLv23_client_method QSslSocket: cannot call unresolved function SSL_library_init QSslSocket: cannot call unresolved function SSLv23_client_method QSslSocket: cannot call unresolved function SSL_library_init

[jinhduong]

Hi @Dekim,
I also faced this problem after I upgrade my aspnetcore image from 1.1 to 2.0, how did you resolve this problem? thanks

[mike-dube]

@jinhduong Sadly it's not an issue with this project but with the lib wktopdf.

It does not support TLS 2.0, so it's impossible to load ressource in https. I had to use base64 image.

[jinhduong]

@Dekim Thanks for your response, I found out the solution for aspnetcore2.0 image and it worked. If you still would like to use external https resources, you can try:

FROM microsoft/aspnetcore:2.0 AS base
RUN ["apt-get", "update"]
RUN ["apt-get", "-y", "install", "libgdiplus"]
RUN ["apt-get", "-y", "install", "xvfb", "libfontconfig", "wkhtmltopdf"]
RUN ["apt-get", "-y", "install", "libc6-dev"]
RUN ["apt-get", "-y", "install", "openssl"]
RUN ["apt-get", "-y", "install", "libssl1.0-dev"]

[mike-dube]

@jinhduong Thanks! Awesome work!

[irfanfarmaku]

@Dekim Thanks for your response, I found out the solution for aspnetcore2.0 image and it worked. If you still would like to use external https resources, you can try:

FROM microsoft/aspnetcore:2.0 AS base
RUN ["apt-get", "update"]
RUN ["apt-get", "-y", "install", "libgdiplus"]
RUN ["apt-get", "-y", "install", "xvfb", "libfontconfig", "wkhtmltopdf"]
RUN ["apt-get", "-y", "install", "libc6-dev"]
RUN ["apt-get", "-y", "install", "openssl"]
RUN ["apt-get", "-y", "install", "libssl1.0-dev"]

awesome, this is working on .net core 3.0 too