The almost 40-page brochure intended for HTML coding for beginners and tutorials but also advanced users can learn something new, overall is the best place to learn. The concept of the lean testing, a combination of testing important test cases and a manageable cost, is in the foreground.

html

Andreas Sanesh and Ulrich Breymann, the authors of the book “Tutorial for html web page and css”, have developed a digital brochure on the “lean testing of combinations with n wise test & decision tables”, that on her when the dpunkt.verlag Book is based.

With this brochure, beginners with HTML and CSS  gain insight first, what test procedures there are Combinatorial testing and how they engage with reasonable effort can be. All the test procedure demonstrates through code examples and with the help of Google testing frameworks. Lean testing will help the developer testing appropriate for his problem in a reasonable time. Condition is to demonstrate the required quality testing.

 

Because of some needs, Skiyo team also started to develop module development for nginx. After reading some information, we wrote our first nginx module.

In fact, the development of nginx module is relatively easy. There are many modules for online open source, which can be used for reference. What shocks me is the OAuth module.

Here you can find good exaples of HTML codes and tutorials for beginners.

The nginx module compares some back-end language implementations. The most important feature is that the speed is fast. This is understandable. The difference between nginx module and apache is that apache loads the so module, and nginx directly compiles the module into the main program. Under my simple test, a very simple module with business logic can reach 1-2w/s requests. If your machine is good enough, this data is more impressive. For a PHP, it can be very good to be able to press 5000/s.

Personally feel that nginx module development data is still relatively small (seemingly contradictory with the above said = =), development is still embarrassing, so if you want to try some nginx module development, and apply to the production environment, recommend some business logic is relatively simple Think again.

Another advantage of nginx module development is that it is very easy to deploy and the compilation is very simple.

web page tutorial

Well, nonsense will not say, the following gives a hello world demo. There are already many examples of hello world on the Internet, which is still very complicated in my opinion. Skiyo team still have to say it by ourself.

Before developing the module, we need to create a new file called “config”. When nginx compiles, let the main program compile my module. If you want more entry level check our previous post about the Best place to learn html, tutorial for beginners, and advanced coding css and html

In this hello world example, config looks like this:

1
2
3
ngx_addon_name = ngx_hello_world_module
HTTP_AUX_FILTER_MODULES = "$ HTTP_MODULES ngx_hello_world_module" 
NGX_ADDON_SRCS = "$ NGX_ADDON_SRCS $ ngx_addon_dir / ngx_hello_world_module.c"

Need to pay attention to the name of the module and the location of your module source code

Then create a new ngx_hello_world_module.c in your directory.

Then enter the following code

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
#include <ngx_core.h> 
#include <ngx_http.h> 
#include <nginx.h>
 
static  char  * ngx_hello_world ( ngx_conf_t * cf , ngx_command_t * cmd ,  void  * conf ) ; 
static ngx_int_t ngx_hello_world_get_output ( ngx_http_request_t * r ,  char  * out_buf ) ; 
static ngx_int_t ngx_hello_world_handler ( ngx_http_request_t * r ) ;
 
/ * Commands * / 
static ngx_command_t ngx_hello_world_commands [ ]  =  { 
    { ngx_string ( "ngx_hello_world" ) , 
      NGX_HTTP_LOC_CONF | NGX_CONF_NOARGS , 
      ngx_hello_world , 
      NGX_HTTP_LOC_CONF_OFFSET , 
      0 , 
      NULL } ,
 
      ngx_null_command
};
 
static ngx_http_module_t  ngx_hello_world_module_ctx = {
    NULL,                                  /* preconfiguration */
    NULL,                                     /* postconfiguration */
 
    NULL,                                  /* create main configuration */
    NULL,                                  /* init main configuration */
 
    NULL,                                  /* create server configuration */
    NULL,                                  /* merge server configuration */
 
    NULL,                                  /* create location configuration */
    NULL                                   /* merge location configuration */
};
 
/ * * / Remedy 
ngx_module_t ngx_hello_world_module =  { 
    NGX_MODULE_V1 , 
    & ngx_hello_world_module_ctx ,               / * module Context * / 
    ngx_hello_world_commands ,                  / * module directives * / 
    NGX_HTTP_MODULE ,                        / * module type * / 
    null ,                                   / * init master * / 
    null ,                                   / * init module * / 
    NULL ,              / * init process * / 
    NULL ,                                   / * init thread * / 
    NULL ,                                   / * exit thread * / 
    NULL ,              / * exit process * / 
    NULL ,                                  /* exit master */
    NGX_MODULE_V1_PADDING
};
 
 
static ngx_int_t ngx_hello_world_get_output(ngx_http_request_t *r, char *out_buf){
 
    sprintf(out_buf, "%s", "Hello World!");
    return NGX_OK;
}
 
static ngx_int_t
ngx_hello_world_handler ( ngx_http_request_t * r ) 
{ 
    ngx_int_t rc ; 
    ngx_buf_t     * b ; 
    ngx_chain_t out ;
 
    /* Http Output Buffer */
    char out_buf[20] = {0};
 
    if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) {
        return NGX_HTTP_NOT_ALLOWED;
    }
 
    rc = ngx_http_discard_request_body(r);
 
    if (rc != NGX_OK && rc != NGX_AGAIN) {
        return rc;
    }
    //定制头信息
    r->headers_out.content_type.len = sizeof("text/html") - 1;
    r->headers_out.content_type.data = (u_char *) "text/html";
 
    if (r->method == NGX_HTTP_HEAD) {
        rc = ngx_http_send_header(r);
 
        if  ( rc == NGX_ERROR || rc > NGX_OK || r -> header_only )  { 
            return rc ; 
        } 
    }
 
    / / Get the output body 
    ngx_hello_world_get_output ( r , out_buf ) ;
 
    b = ngx_pcalloc ( r -> pool ,  sizeof ( ngx_buf_t ) ) ; 
    if  ( b == NULL )  { 
        return NGX_HTTP_INTERNAL_SERVER_ERROR ; 
    }
 
    out.buf = b;
    out.next = NULL;
 
    b->pos = (u_char *)out_buf;
    b->last = (u_char *)out_buf + strlen(out_buf);
    b->memory = 1;
    b->last_buf = 1;
    r->headers_out.status = NGX_HTTP_OK;
    r->headers_out.content_length_n = strlen(out_buf);
 
    rc = ngx_http_send_header(r);
 
    if  ( rc == NGX_ERROR || rc > NGX_OK || r -> header_only )  { 
        return rc ; 
    }
 
    return ngx_http_output_filter(r, &out);
}
 
static  char  * 
ngx_hello_world ( ngx_conf_t * cf , ngx_command_t * cmd ,  void  * conf ) 
{ 
    ngx_http_core_loc_conf_t * clcf = ngx_http_conf_get_module_loc_conf ( cf , ngx_http_core_module ) ;
 
    /* register hanlder */
    clcf->handler = ngx_hello_world_handler;
 
    return NGX_CONF_OK ; 
}

Then compile.
What you need to understand when compiling is that we don’t have to compile our module. We only need to add the –add-module parameter when compiling nginx.

In addition, nginx rewrite is required to use the pcre library, so before compiling nginx, please compile and install pcre.

Then go to the nginx directory and configure

View Code

1
./configure --prefix=/home/www/nginx --user=www --group=www --add-module=/home/www/download/ngx_hello_world --with-cc-opt="-I /home/www/pcre/include" --with-ld-opt="-L /home/www/pcre/lib"

After –add-module is the directory address of our module. This directory contains the config file just written. The latter two are the directories that specify pcre. If you do not specify the installation directory when you configure pcre, you can remove these two parameters. .

After the compilation is complete, our module is “fitted” with the nginx main program.

At this point we enter nginx.conf and add the following information to your server block:

1
2
3
location /hello {
	ngx_hello_world;
}

Then start nginx, then open your server / hello can see the output hello world information. If you are interested, you can use PHP to write a Hello World, and then press to compare performance:)

The following is the package download of this module:

ngx_hello_world

HTML tags and programming languages tutorial

Place 2 used Python in the ranking of the most popular programming languages in the classroom. In contrast to BASIC Python already more recent thinking of programming takes up – about the block structure and object orientation. Thus, it resembles more familiar languages such as Java, C++ and c#, which are widely used in the industry. This Python is considered but easier to learn.

We will enter at this point doesn’t matter, what object orientation really means you are anyway quickly learn that if you are dealing with Python. Only so much be said: sound knowledge in object-oriented programming language is a very useful skill. You can download an Python Interpreter free of charge.

If you want to learn Python, there are that many online posts and courses as the ” complete Python boot camp “and” the complete Python developer course “.

html

With the currently explosive market growth of Android smartphones and tablets, you might have but also the desire to develop your own apps. A large part of all apps is written in Java (which is not the same as JavaScript, more on that later). Also in terms of career opportunities, learning could by Java will be helpful for Android still gaining popularity. Java is one of the object-oriented languages – the step about Python to Java would be so logical. If you want to learn Java, you have several options: the Java Developers Kit (JDK) is available free of charge and runs on your PC.

Alternatively, there are also various online tutorials where you can write the HTML code online and try it out on a Web page, CompileJava is one of them.

If you it very specifically au f Android app development have aside, you need Android Studio and – in addition to the Java language – a good introduction to the Android development environment. Rush so nothing and concentrate better only on Java.

Nowadays, most programming languages are object-oriented. Although the syntax of individual languages varies, it still is you easier to switch to another after learning an object-oriented language. If you want to know which programming languages in the industry is most commonly used, take a look in the Ttiobe index.

Web programming with HTML and CSS

Fürs Web programming is fundamentally different than anything we have previously addressed. Still worth the effort, to learn Web programming. To use for creating rather simple Web pages usually HTML “HyperText Markup Language”, the best in the Latest version of HTML5 . As a “markup language” HTML puts together a list of instructions and commands, which are executed in sequence, but describes how text and images on the screen should be displayed. The major part of an HTML document therefore also often consists of the text that you see on the Web page – however interspersed by so-called tags. For example the day < header > is a text the following text is represented as a heading. This principle is of course more complex as you add more images, graphics, tables, and links.

Validation tools for HTML, CSS, and JavaScript

Couple weeks ago on our Skiyo Blog, some users asked for validation tool. The software enough to to create HTML that is usually already on your PC. An HTML document can be written in a normal text editor such as Notepad, for example – as long as the .htm or .html file name. Since then opens the document as a Web page in your default browser. Most browsers now also display the HTML code of a Web page you, that you have just called. Professional tools – about the CoffeeCup Free HTML Editor – provide advanced functions, such as the dyeing of tags in the document for a better overview.

HTML forms the basic structure of a Web page, but you get an appealing layout only with CSS (cascaded style sheets CSS). An example of how CSS works: HTML can transform a plain text in a heading. In the best case the browser, the page is called, used his standard font type, size, and color for each level of the heading. With HTML, these properties can be adjusted manually singly – CSS makes it even easier. Because a separate CSS document can determine exactly what each level of the heading should look like. And if a change is necessary, you replace just the CSS document instead of working all of the HTML code. With a CSS document can be missed, for example, each sub-page of a website of the same corporate look, without each time having to retype the formatting options.

Webmaster tools for HTML, CSS, JavaScript, and Web apps

One on HTML and CSS-based Web page is static – only an additional programming language can incorporate dynamic content. You must so to insert code that responds to the actions of the user. This type of code is running, for example, if you log in on one side. Typically, JavaScript is used for code to run in the browser or on the client machine and PHP to run on the server .

Other teaching resources

Of course you not only face the challenge of learning a new programming language. Outside help is there almost everywhere – also and especially for those who don’t want to learn full time. For example, Codecademy is recommended. Very helpful, and definitely there are the Programming course from Udemy worth a look.

Suitable especially for code beginners and children 9 years and older (with good English knowledge) online courses (projects called) of the Code Club . Who would rather live wants to learn with others under the guidance and programming, is always a Dojo in its proximity in the CoderDojo . The app ” apps for good ” helps young people in programming their own apps.