libxml2 | 易学教程

Is it Possible to Send libxml Output to a File Handle?

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问题 This is a simplified version of my earlier question, which may have been too situation specific to allow anyone to answer. Is it possible to send libxml output to a file handle of a previously opened file (E.G. stdin) rather than a file name as used in these examples? If it is then it may provide an answer to my earlier query. Versions etc. Language: C Fedora Linux r20 Apache 2.4.10 libxml2 回答1: This is from the same link you posted xmlBufferPtr buf; /* Create a new XML buffer, to which the

Problems with libxml2 when installing Ruby on Rails on OSX Mavericks

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问题 I'm having a problem installing Ruby on Rails in my terminal. Has anyone else encountered the following error in the terminal: checking for main() in -llzma... yes checking for xmlParseDoc() in libxml/parser.h... no checking for xmlParseDoc() in -lxml2... no checking for xmlParseDoc() in -llibxml2... no ----- libxml2 is missing. Please locate mkmf.log to investigate how it is failing. ----- *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary

编译libxml2

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1.下载libxml2库 ftp://xmlsoft.org/libxml2/libxml2-sources-2.9.9.tar.gz 2. 将下载后的文件解压到如下目录 E:\osg\libxml2\libxml2-2.9.9 3. 新建E:\osg\libxml2\libxml2目录把安装libiconv生成的iconv.lib、iconv.h文件夹拷贝到E:\osg\libxml2\libxml2文件夹下的lib和include文件夹 4.编译配置打开X64 Native Tools Command Prompt for VS 2019程序 cd E:\osg\libxml2\libxml2-2.9.9\win32 cscript configure.js compiler=msvc prefix=E:\osg\libxml2\libxml2 include=E:\osg\libxml2\libxml2\include lib=E:\osg\libxml2\libxml2\lib debug=no iconv=yes 4.编译 nmake /f Makefile.msvc install > releasex.log ----------------------------------------- 来源： https://www.cnblogs.com

Extract part of HTML in C/Objective-C

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问题 I need to extract the detail content of a website while preserve all formatting of the division. The section I wish to extract is: ... <div class="detailContent"> Hinweis: Auf ... </div> ... My current solution is to use HTMLParser from libxml2 and xpath to find the nodes and walk through all the nodes to reconstruct this piece of HTML. This is a long an complicated code. I' just wondering if there is an easier solution to extract part of HTML? Thanks. 回答1:

Schema validation with maxOccurs element fails

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问题 Schema for the element which occurs multiple (e.g. 2 times) times in XML,always fails giving the error "Schemas validity error : Element 'name': This element is not expected". "name" is an intermediate elements of XML file i.e. we have other elements in XML and "name" comes in mid of XML file. XML file have proper header as " " Sample "name" element in XML file : <name> <First>1</First> <last>1</last> </name> <name> <First>1</First> <last>1</last> </name> Sample Schema tried as below, but

使用Scrapy爬虫框架简单爬取图片并保存本地(妹子图）

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初学Scrapy，实现爬取网络图片并保存本地功能一、先看最终效果保存在 F:\pics 文件夹下二、安装scrapy 1、python的安装就不说了，我用的python2.7，执行命令 pip install scrapy ，或者使用 easy_install 命令都可以 2、可能会报如下错误 *********************************************************** Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed? *********************************************************** 1 2 3 1 2 3 解决方法：安装libxml2 下载对应的 Python 的版本，安装即可，网址： https://pypi.python.org/pypi/lxml/3.4.4 三、创建项目 1、执行命令 scrapy startproject xiaohuar 1 1 会自动创建 xiaohuar 的scrapy项目 2、项目结构（我用的是WingIDE）文件说明： • scrapy.cfg 项目的配置信息，主要为Scrapy命令行工具提供一个基础的配置信息。

libxml-ruby failed to load at x86_64

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问题 We are having problem with libxml-ruby gem at the server side Possible because it uses x86_64 architecture: $ uname -a Linux ip-10-228-171-64 2.6.21.7-2.fc8xen-ec2-v1.0 #1 SMP Tue Sep 1 10:25:30 EDT 2009 x86_64 GNU/Linux require 'libxml' LoadError: /usr/local/ruby-enterprise/lib/ruby/gems/1.8/gems/libxml-ruby-1.1.4/lib/libxml_ruby.so: invalid ELF header - /usr/local/ruby-enterprise/lib/ruby/gems/1.8/gems/libxml-ruby-1.1.4/lib/libxml_ruby.so from /usr/local/ruby-enterprise/lib/ruby/gems/1.8

Why does lxml.html sometimes swallow/remove whitespace instead of preserving it?

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问题 Given the following code, one might reasonably expect almost the exact same string of HTML that was fed into lxml to be to spit back out. from lxml import html HTML_TEST_STRING = r""" <pre> abc def ghi jkl mno pqr </pre> """ parser = html.HTMLParser( remove_blank_text=False ) doc = html.fromstring( HTML_TEST_STRING, parser=parser ) print( html_out_string ) Instead, even though everything is contained within a <pre> pre-formatted code

Dtd validation with libxml2

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问题 how do i do dtd validation with libxml2? i am reading my xml file using the reader api. i have an external dtd validation file. how do i perform the validation itself? do i have to convert it to xsd? 回答1: Use xmlValidateDtd api, as described in FAQ, point 11. This function is used by xmllint application, when --dtdvalid is supplied. See the source file, xmllint.c, parseAndPrintFile function. Search for xmlValidateDtd , it's used only once now. 回答2: If your are using python as your programming

xpath: How do we select just the very last text node?

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问题 How do I select the globally-last text node using xpath? I tried this, but it gives me the last node in every context of the document. lxml.html.fromstring('1<a>234<c>5</c>6</a>').xpath('//text()[last()]') ['1', '3', '5', '6'] I can do this, but it's inefficient in both time and space, especially as the document gets large. lxml.html.fromstring('1<a>234<c>5</c>6</a>').xpath('//text()[last()]')[-1] '6' I tried to use an index of -1, but that gives me an empty list. I tried to use