php|architect's Guide to Web Scraping with PHP - Wind Business ...

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CONTENTS ” vii Chapter 5 — pecl_http PECL Extension 49 GET Requests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 POST Requests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Handling H eaders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Debugging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 T imeouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Content Encoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Cookies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 HTTP Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 Redirection and Referers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Content Caching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 U ser Agents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Byte Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Request P ooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 W rap-U p . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Chapter 6 — PEAR::HTTP_Client 61 Requests and Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 J uggling Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 W rangling H eaders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 U sing the Client . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 Observing Requests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 W rap-U p . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 Chapter 7 — Zend_Http_Client 71 Basic Requests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 URL Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Cus<strong>to</strong>m H eaders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 Debugging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 Cookies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 Redirection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 U ser Agents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
viii ” CONTENTS HTTP Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 W rap-U p . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 Chapter 8 — Rolling Your Own 81 Sending Requests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 P arsing Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 Transfer Encoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 Content Encoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 T iming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 Chapter 9 — T idy Extension 89 V alidation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 T idy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 Debugging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 W rap-U p . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 Chapter 10 — DOM Extension 99 Types of P arsers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 Loading Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 Tree Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 Elements and Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 Locating N odes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 XP ath and DOMXP ath . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 Absolute Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105 Relative Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 Addressing Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 U nions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
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Page 7: vi ” CONTENTS Referring URLs . .
Page 11: x ” CONTENTS Chapter 14 — PCRE
Page 15 and 16: xiv ” CONTENTS pleted. Each had a
Page 18 and 19: For ewor d W eb scraping is the fut
Page 21 and 22: Chapter 1 Introduction If you are l
Page 23 and 24: Introduction ” 3 in some instance
Page 25: Introduction ” 5 • Chapters 3-7
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38 ” cURL Extension Setting M ult
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Chapter 6 P EAR::HTTP_Client The PH
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Chapter 13 CSS Selector Libraries T
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CSS Selector Libraries ” 131 Abou
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CSS Selector Libraries ” 133 •
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CSS Selector Libraries ” 139 It
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Chapter 14 PCRE Extension There are
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PCRE Extension ” 145 Anchors Y o
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PCRE Extension ” 147 // Matches
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PCRE Extension ” 149 if (preg_mat
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PCRE Extension ” 151 The first wa
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T i p sand T r i c k s Chapter 15 C
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T i p s and T r i c ” k 159 s not
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A p p e n d i x A Legality of W e S
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