linuxphp安装所需要的所有支持安装文件：libxml2-2.6.32资源-CSDN文库

5星 · 超过95%的资源需积分: 40 71 浏览量 2009-06-27 16:33:02 上传评论 1 收藏 4.5MB GZ 举报

共2000个文件

xml：768个

err：477个

html：231个

资源详情

资源评论

资源推荐

收起资源包目录

linux php安装所需要的所有支持安装文件：libxml2-2.6.32 （2000个子文件）

xmllint.1 11KB

xmlcatalog.1 6KB

xml2-config.1 1KB

libxml.3 2KB

302836_0 0B

302836_err 36B

302836_valid 0B

307377_0 0B

307377_1 0B

307377_2 0B

307377_err 36B

307377_valid 0B

a 61B

a 40B

aba 97B

aba 60B

abaa 172B

abaa 50B

abba 169B

abba 40B

addressBook_err 41B

addressBook_valid 0B

all1_0_0 36B

all_0_0 35B

all_0_1 35B

all_0_2 35B

all_0_3 43B

all_0_4 43B

all_0_5 43B

all_0_6 43B

all_0_7 43B

all_1_0 35B

all_1_1 35B

all_1_2 35B

all_1_3 35B

all_1_4 35B

all_1_5 43B

all_1_6 35B

all_1_7 35B

all_2_0 43B

all_2_1 43B

all_2_2 43B

all_2_3 35B

all_2_4 43B

all_2_5 43B

all_2_6 35B

all_2_7 35B

allsg_0_0 37B

allsg_0_1 37B

allsg_0_2 37B

allsg_0_3 45B

allsg_0_4 45B

allsg_0_5 45B

Makefile.am 53KB

Makefile.am 5KB

Makefile.am 2KB

Makefile.am 1KB

Makefile.am 909B

Makefile.am 400B

Makefile.am 116B

annot-err_0_0 0B

any1_0_0 36B

any2_0_0 36B

any3_0_0 44B

any4_0_0 36B

any5_0_0 44B

any5_0_1 44B

any5_0_2 44B

any5_0_3 36B

any5_0_4 44B

any5_0_5 44B

any5_0_6 44B

any5_1_0 44B

any5_1_1 44B

any5_1_2 36B

any5_1_3 44B

any5_1_4 44B

any5_1_5 36B

any5_1_6 44B

any6_1_0 36B

any6_2_0 36B

any7_1_0 44B

any7_1_1 44B

any7_1_2 36B

any7_2_0 44B

any7_2_1 44B

any7_2_2 36B

any8_1_0 36B

anyAttr-derive-errors1_0_0 54B

anyAttr-derive1_0_0 47B

anyAttr-derive2_0_0 47B

anyAttr-processContents-err1_0_0 68B

anyAttr-processContents1_0_0 56B

anyAttr1_0_0 40B

att1 65B

att1 43B

共 2000 条

Libxml Tutorial

John Fleck <jfleck@inkstain.net>

Revision History

Revision 1 June 4, 2002

Initial draft

Revision 2 June 12, 2002

retrieving attribute value added

Revision 3 Aug. 31, 2002

freeing memory fix

Revision 4 Nov. 10, 2002

encoding discussion added

Revision 5 Dec. 15, 2002

more memory freeing changes

Revision 6 Jan. 26. 2003

add index

Revision 7 April 25, 2003

add compilation appendix

Revision 8 July 24, 2003

add XPath example

Revision 9 Feb. 14, 2004

Fix bug in XPath example

Revision 7 Aug. 24, 2004

Fix another bug in XPath example

Table of Contents

Introduction ...............................................................................2

Data Types ................................................................................2

Parsing the file ...........................................................................3

Retrieving Element Content .......................................................... 3

Using XPath to Retrieve Element Content ........................................ 4

Writing element content ............................................................... 6

Writing Attribute ........................................................................6

Retrieving Attributes ...................................................................7

Encoding Conversion ...................................................................8

A. Compilation ...........................................................................9

B. Sample Document ...................................................................9

C. Code for Keyword Example ......................................................9

D. Code for XPath Example ........................................................ 10

E. Code for Add Keyword Example .............................................. 12

F. Code for Add Attribute Example .............................................. 13

G. Code for Retrieving Attribute Value Example ............................. 14

H. Code for Encoding Conversion Example ................................... 15

I. Acknowledgements ................................................................ 16

Abstract

Libxml is a freely licensed C language library for handling XML, portable

across a large number of platforms. This tutorial provides examples of its basic

functions.

Introduction

Libxml is a C language library implementing functions for reading, creating and

manipulating XML data. This tutorial provides example code and explanations

of its basic functionality.

Libxml and more details about its use are available on the project home page.

Included there is complete API documentation. This tutorial is not meant to sub-

stitute for that complete documentation, but to illustrate the functions needed to

use the library to perform basic operations.

The tutorial is based on a simple XML application I use for articles I write. The

format includes metadata and the body of the article.

The example code in this tutorial demonstrates how to:

• Parse the document.

• Extract the text within a specified element.

• Add an element and its content.

• Add an attribute.

• Extract the value of an attribute.

Full code for the examples is included in the appendices.

Data Types

Libxml declares a number of data types we will encounter repeatedly, hiding the

messy stuff so you do not have to deal with it unless you have some specific

need.

xmlChar A basic replacement for char, a byte in a UTF-8

encoded string. If your data uses another encod-

ing, it must be converted to UTF-8 for use with

libxml's functions. More information on encoding

is available on the libxml encoding support web

page.

xmlDoc A structure containing the tree created by a parsed

doc. xmlDocPtr is a pointer to the structure.

xmlNodePtr and xml-

Node

A structure containing a single node. xmlNodePtr

is a pointer to the structure, and is used in travers-

ing the document tree.

Libxml Tutorial

Parsing the file

Parsing the file requires only the name of the file and a single function call, plus

error checking. Full code: Appendix C, Code for Keyword Example

❶ xmlDocPtr doc;

❷ xmlNodePtr cur;

❸ doc = xmlParseFile(docname);

❹ if (doc == NULL ) {

fprintf(stderr,"Document not parsed successfully. \n");

return;

}

❺ cur = xmlDocGetRootElement(doc);

❻ if (cur == NULL) {

fprintf(stderr,"empty document\n");

xmlFreeDoc(doc);

return;

}

❼ if (xmlStrcmp(cur->name, (const xmlChar *) "story")) {

fprintf(stderr,"document of the wrong type, root node != story");

xmlFreeDoc(doc);

return;

}

❶ Declare the pointer that will point to your parsed document.

❷ Declare a node pointer (you'll need this in order to interact with individual

nodes).

❹ Check to see that the document was successfully parsed. If it was not,

libxml will at this point register an error and stop.

Note

One common example of an error at this point is improper handling of

encoding. The XML standard requires documents stored with an encod-

ing other than UTF-8 or UTF-16 to contain an explicit declaration of

their encoding. If the declaration is there, libxml will automatically per-

form the necessary conversion to UTF-8 for you. More information on

XML's encoding requirements is contained in the standard.

❺ Retrieve the document's root element.

❻ Check to make sure the document actually contains something.

❼ In our case, we need to make sure the document is the right type. "story" is

the root type of the documents used in this tutorial.

Retrieving Element Content

Retrieving the content of an element involves traversing the document tree until

you find what you are looking for. In this case, we are looking for an element

called "keyword" contained within element called "story". The process to find

the node we are interested in involves tediously walking the tree. We assume

Libxml Tutorial

you already have an xmlDocPtr called doc and an xmlNodPtr called cur.

❶cur = cur->xmlChildrenNode;

❷while (cur != NULL) {

if ((!xmlStrcmp(cur->name, (const xmlChar *)"storyinfo"))){

parseStory (doc, cur);

}

cur = cur->next;

}

❶ Get the first child node of cur. At this point, cur points at the document

root, which is the element "story".

❷ This loop iterates through the elements that are children of "story", looking

for one called "storyinfo". That is the element that will contain the

"keywords" we are looking for. It uses the libxml string comparison func-

tion, xmlStrcmp. If there is a match, it calls the function parseStory.

void

parseStory (xmlDocPtr doc, xmlNodePtr cur) {

xmlChar *key;

❶ cur = cur->xmlChildrenNode;

❷ while (cur != NULL) {

if ((!xmlStrcmp(cur->name, (const xmlChar *)"keyword"))) {

❸ key = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);

printf("keyword: %s\n", key);

xmlFree(key);

}

cur = cur->next;

}

return;

}

❶ Again we get the first child node.

❷ Like the loop above, we then iterate through the nodes, looking for one that

matches the element we're interested in, in this case "keyword".

❸ When we find the "keyword" element, we need to print its contents. Re-

member that in XML, the text contained within an element is a child node

of that element, so we turn to cur->xmlChildrenNode. To retrieve it,

we use the function xmlNodeListGetString, which also takes the

doc pointer as an argument. In this case, we just print it out.

Note

Because xmlNodeListGetString allocates memory for the string

it returns, you must use xmlFree to free it.

Using XPath to Retrieve Element

Content

In addition to walking the document tree to find an element, Libxml2 includes

Libxml Tutorial

support for use of XPath expressions to retrieve sets of nodes that match a spe-

cified criteria. Full documentation of the XPath API is here.

XPath allows searching through a document for nodes that match specified cri-

teria. In the example below we search through a document for the contents of all

keyword elements.

Note

A full discussion of XPath is beyond the scope of this document. For

details on its use, see the XPath specification.

Full code for this example is at Appendix D, Code for XPath Example.

Using XPath requires setting up an xmlXPathContext and then supplying the

XPath expression and the context to the xmlXPathEvalExpression func-

tion. The function returns an xmlXPathObjectPtr, which includes the set of

nodes satisfying the XPath expression.

xmlXPathObjectPtr

getnodeset (xmlDocPtr doc, xmlChar *xpath){

❶xmlXPathContextPtr context;

xmlXPathObjectPtr result;

❷context = xmlXPathNewContext(doc);

❸result = xmlXPathEvalExpression(xpath, context);

❹if(xmlXPathNodeSetIsEmpty(result->nodesetval)){

xmlXPathFreeObject(result);

printf("No result\n");

return NULL;

❶ First we declare our variables.

❷ Initialize the context variable.

❸ Apply the XPath expression.

❹ Check the result and free the memory allocated to result if no result is

found.

The xmlPathObjectPtr returned by the function contains a set of nodes and other

information needed to iterate through the set and act on the results. For this ex-

ample, our functions returns the xmlXPathObjectPtr. We use it to print the

contents of keyword nodes in our document. The node set object includes the

number of elements in the set (nodeNr) and an array of nodes (nodeTab):

❶for (i=0; i < nodeset->nodeNr; i++) {

❷keyword = xmlNodeListGetString(doc, nodeset->nodeTab[i]->xmlChildrenNode, 1);

printf("keyword: %s\n", keyword);

xmlFree(keyword);

}

❶ The value of nodeset->Nr holds the number of elements in the node

set. Here we use it to iterate through the array.

❷ Here we print the contents of each of the nodes returned.

Libxml Tutorial

zhenkexi

2016-09-06

非常好用，推荐不错

评论收藏

内容反馈

liaolingfen4

粉丝: 2
资源: 16

linux php安装所需要的所有支持安装文件：libxml2-2.6.32

评论10

最新资源

linux php安装所需要的所有支持安装文件：libxml2-2.6.32

评论10

linux libxml2-2.6.26

libxml2-2.6.26 x86-64

libxml2-2.6.32.tar.gz

Ubuntu11.10 libxml2-dev

libxml2-python-2.9.1-6.el7.5.x86_64.rpm

libxml2-2.9.1.tar.gz

libxml2-devel-2.9.7-9.el8_4.2.i686.rpm

libxml2-python-2.9.1-5.el7_0.1.x86_64.rpm

libxml2-2.9.2_compile_20170118_1636.tar.gz

libxml2-devel-2.9.1-6.el7_9.6.x86_64.rpm

libxml2-devel-2.9.1-6.el7.5.x86_64.rpm

libxml2-2.9.1-6.el7.5.x86_64.rpm

libxml2-devel-2.7.6-20.el6.x86_64.rpm

libxml2-2.9.8源码及编译方法

libxml2-2.9.9.tar.gz

linux php 所支持的安装文件：libpng

libxml2-2.9.3 免积分

libxml2-2.9.0免积分下载

libxml2-2.9.0-12.zip libxml2-2.9.0-libxml2-2.9.12共计13个版本汇总

libxml2-devel-2.6.23-1.2.i386.rpm

libxml2-2.7.6-20.el6.x86_64.rpm

Java第十五届蓝桥杯大赛软件JavaB组真题

SwitchHosts

安卓期末大作业（AndroidStudio开发），垃圾分类助手app，分为前台后台，代码有注释，均能正常运行

Notepad++安装包

2024北森能力测评题库.7z

微信小程序源码-合集1.rar

Java面试八股文2023最新版

Linux Centos7 升级最新版OpenSSH-9.6p1 有脚本（支持离线）

JDK1.8 windows 64位

最新资源