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How to save an HTML5 Canvas as an image on a server?
...ntext.stroke();
</script>
Convert canvas image to URL format (base64)
var dataURL = canvas.toDataURL();
Send it to your server via Ajax
$.ajax({
type: "POST",
url: "script.php",
data: {
imgBase64: dataURL
}
}).done(function(o) {
con...
Hash function that produces short hashes?
...duce a sub-10-character hash? I want to produce reasonably unique ID's but based on message contents, rather than randomly.
...
Adding header for HttpURLConnection
...redentials = "username:password";
String basicAuth = "Basic " + new String(Base64.getEncoder().encode(userCredentials.getBytes()));
myURLConnection.setRequestProperty ("Authorization", basicAuth);
myURLConnection.setRequestMethod("POST");
myURLConnection.setRequestProperty("Content-Type", "applicat...
Best way to create unique token in Rails?
...when using Ruby 1.9 and ActiveRecord):
class ModelName < ActiveRecord::Base
before_create :generate_token
protected
def generate_token
self.token = loop do
random_token = SecureRandom.urlsafe_base64(nil, false)
break random_token unless ModelName.exists?(token: random_to...
Load RSA public key from file
...eys.
The der format can be obtained but saving raw data ( without encoding base64).
I hope this helps programmers.
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStr...
How to serialize an object into a string
...t. I would like to serialize the object into a string and store into a database instead. Can anyone help me?
13 Answers
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再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网 - 专注IT技能提升
...样的标识（比如某个字段，或者子对象）时，序列化就会失败。KnownTypeAttribute就提供了为我们通知序列化器去寻找未知对象的映射的途径。在Remoting中这样的问题不会存在，因为Remoting实际上是通过将一个类型传递给双方来进行...
再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网 - 专注IT技能提升
...样的标识（比如某个字段，或者子对象）时，序列化就会失败。KnownTypeAttribute就提供了为我们通知序列化器去寻找未知对象的映射的途径。在Remoting中这样的问题不会存在，因为Remoting实际上是通过将一个类型传递给双方来进行...
再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网 - 专注IT技能提升
...样的标识（比如某个字段，或者子对象）时，序列化就会失败。KnownTypeAttribute就提供了为我们通知序列化器去寻找未知对象的映射的途径。在Remoting中这样的问题不会存在，因为Remoting实际上是通过将一个类型传递给双方来进行...
再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网 - 专注IT技能提升
...样的标识（比如某个字段，或者子对象）时，序列化就会失败。KnownTypeAttribute就提供了为我们通知序列化器去寻找未知对象的映射的途径。在Remoting中这样的问题不会存在，因为Remoting实际上是通过将一个类型传递给双方来进行...