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Dynamsoft Developer Blog

Get the latest information, insights, tutorials, and news from Dynamsoft.

  • Take a Photo and Upload it on Mobile Phones with HTML5

    Apr 01, 2014  Miscellaneous

    In my daily life, I enjoy taking photos with my smartphone and uploading them to various websites. So I started thinking, “Is it possible to implement these functions in a web browser?” Fortunately, the new HTML5 SDK is capable of uploading local images or captured images to web servers. Everything...

    •  HTML5
    •  CAMERA
    •  MOBILE
    •  PHP
  • How to Use JavaScript to Save Canvas Data in Chrome

    Mar 31, 2014  Miscellaneous

    In HTML5, there is a new tag <canvas>, which is used to draw graphics via JavaScript. In this tutorial, I would like to share how to draw images on canvas, and how to save the canvas data to local disk by clicking button. Ads Powered by Dynamsoft Draw Images on...

    •  HTML5
    •  JAVASCRIPT
    •  CANVAS
    •  CHROME
  • Libwebsockets Introduction

    Mar 20, 2014  Miscellaneous

    In this article, I will share the basic concept of Libwebsockets, as well as how to write a simple program with the APIs. What is Libwebsockets Libwebsockets is a lightweight pure C library; built to use minimal CPU and memory resources as well as providing fast throughput in both directions....

    •  LIBWEBSOCKETS
  • How to Use OpenSSL to Sign Certificate

    Mar 13, 2014  Miscellaneous

    In this tutorial, let’s continue to learn how to use OpenSSL to sign a certificate. Steps of Signing Certificate with OpenSSL We can use the command line to quickly generate ca certificate. openssl genrsa -out cakey.pem 2048 openssl req -new -days 365 -x509 -key cakey.pem -out cacert.pem -nodes -subj /C=CA/ST=BC/L=Vancouver/O=Dynamsoft/OU=Dynamsoft/CN=Dynamsoft/emailAddress=support@dynamsoft.com...

    •  OPENSSL
    •  C/C++
  • How to Read and Write Excel Files in Java

    Mar 12, 2014  Miscellaneous

    Previously, I talked about how to check PageRank in Java. In this article, I will combine PageRank with Excel files. To operate Excel files in Java, I used Apache POI - the Java API for Microsoft Documents. Apparently, you can download the API package, and follow the relevant tutorials to...

    •  JAVA
    •  PAGE RANK
    •  SEO
    •  EXCEL
  • How to Use OpenSSL to Generate X.509 Certificate Request

    Mar 03, 2014  Miscellaneous

    In this tutorial, let’s learn how to use OpenSSL to generate X.509 certificate request. Certificate signing request is a message sent from an applicant to a certificate authority, which usually includes: Country Name (2 letter code) [US] State or Province Name (full name) [BC] Locality Name (e.g., city) [Vancouver] Organization...

    •  OPENSSL
    •  CERTIFICATE
    •  SECURITY
  • How to Use OpenSSL to Generate RSA Keys in C/C++

    Feb 26, 2014  Miscellaneous

    It is known that RSA is a cryptosystem which is used for the security of data transmission. This tutorial introduces how to use RSA to generate a pair of public and private keys on Windows. Download and install OpenSSL https://www.openssl.org/community/binaries.html. Find libeay32.lib, ssleay32.lib and libeay32.dll. The following sample code will...

    •  RSA
    •  OPENSSL
    •  C/C++
    •  SECURITY
  • How to Extract Domain Names from URLs in VBA

    Feb 11, 2014  Miscellaneous

    Backlink is one of the most important factors for search engine ranking. Thus, the analysis of backlinks is significant for website owners. It is known that Google Webmaster tools can record search traffic allowing users to check the links to their sites. We can download the relevant data as figure...

    •  VBA
    •  BACKLINK
    •  VISUAL BASIC
    •  SEO
  • Brief Introduction of Strong Name Signatures

    Feb 07, 2014  Miscellaneous

    Strong name signatures consist of the identities of an assembly. They are strengthened by both public keys and digital signatures (as generated from the assembly). The identities include the plain text name, version number and regional information of the assembly (if provided). An assembly with a strong name can only...

    •  SIGNATURE
    •  SECURITY
  • Have Fun with the WPF Demo of .NET TWAIN 5.0

    Jan 14, 2014  Document Scanning

    Dynamic .NET TWAIN 5.0 has been released for a while. To help users to quickly grasp APIs, a brand-new API demo, written in WPF with C# & VB.NET, is included. In this tutorial, we would like to show the anatomy of this application. Let’s glance at the screenshot as a...

    •  OCR
    •  .NET TWAIN
    •  C#
    •  DOCUMENT SCANNING
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