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问题 一：
我下载编译了cgic205中的cgictest.c cgic.c cgic.h 文件，放在在我的Apche2.2的cgi-bin目录中。
我打开浏览器调用cgi-bin/cgitest.exe 显示正常上传文本文件回显正常。可是上传.gif图片回显是一堆乱码，难道cgitest.c文件显示不了图片吗？要怎么改才能回显图片呢？
我搜过一篇显示图片的文章是用setmode(fileno(stdout),O_BINARY)函数原文如下：
“如果你的脚本发送图形数据，使用面向字符的流则意味着立即失败。解决方法是将流切换到二进制模式。在C语言中，可以使用setmode函数：setmode(fileno(stdout),O_BINARY)。通过setmode(fi1eno(stdout),O_TEXT)在流当中进行切换。一个典型的图形脚本以字符模式输出头部，而后切换到二进制模式用于图形数据。”
但是我不会用
问题二：
还有一个问题就是我看到cgic.c文件中为什么把setmode(fileno(stdout),O_BINARY)函数写成这样：
#ifdef WIN32
/* 1.07: Must set stdin and stdout to binary mode */
/* 2.0: this is particularly crucial now and must not be removed */
_setmode( _fileno( stdin ), _O_BINARY );
_setmode( _fileno( stdout ), _O_BINARY );
#endif /* WIN32 */
难道写windows 平台程序要#define WIN32 吗？
我没#define WIN32 我的cgitest.exe为什么也能照样运行呢？
问题一代码：
请老大们帮忙改一下附上cgitest.c原码：（可能只改 file()函数就行）
* Change this if the SERVER_NAME environment variable does not report
the true name of your web server. */
#if 1
#define SERVER_NAME cgiServerName
#endif
#if 0
#define SERVER_NAME "www.boutell.com"
#endif
/* You may need to change this, particularly under Windows;
it is a reasonable guess as to an acceptable place to
store a saved environment in order to test that feature.
If that feature is not important to you, you needn't
concern yourself with this. */
#ifdef WIN32
#define SAVED_ENVIRONMENT "c:\\cgicsave.env"
#else
#define SAVED_ENVIRONMENT "/tmp/cgicsave.env"
#endif /* WIN32 */
#include <stdio.h>
#include "cgic.h"
#include <string.h>
#include <stdlib.h>
void HandleSubmit();
void ShowForm();
void CookieSet();
void Name();
void Address();
void Hungry();
void Temperature();
void Frogs();
void Color();
void Flavors();
void NonExButtons();
void RadioButtons();
void File();
void Entries();
void Cookies();
void LoadEnvironment();
void SaveEnvironment();
int cgiMain() {
#ifdef DEBUG
LoadEnvironment();
#endif /* DEBUG */
/* Load a previously saved CGI scenario if that button
has been pressed. */
if (cgiFormSubmitClicked("loadenvironment") == cgiFormSuccess) {
LoadEnvironment();
}
/* Set any new cookie requested. Must be done *before*
outputting the content type. */
CookieSet();
/* Send the content type, letting the browser know this is HTML */
cgiHeaderContentType("text/html");
/* Top of the page */
fprintf(cgiOut, "<HTML><HEAD>\n");
fprintf(cgiOut, "<TITLE>cgic test</TITLE></HEAD>\n");
fprintf(cgiOut, "<BODY><H1>cgic test</H1>\n");
/* If a submit button has already been clicked, act on the
submission of the form. */
if ((cgiFormSubmitClicked("testcgic") == cgiFormSuccess) ||
cgiFormSubmitClicked("saveenvironment") == cgiFormSuccess)
{
HandleSubmit();
fprintf(cgiOut, "<hr>\n");
}
/* Now show the form */
ShowForm();
/* Finish up the page */
fprintf(cgiOut, "</BODY></HTML>\n");
return 0;
}
void HandleSubmit()
{
Name();
Address();
Hungry();
Temperature();
Frogs();
Color();
Flavors();
NonExButtons();
RadioButtons();
File();
Entries();
Cookies();
/* The saveenvironment button, in addition to submitting the form,
also saves the resulting CGI scenario to disk for later
replay with the 'load saved environment' button. */
if (cgiFormSubmitClicked("saveenvironment") == cgiFormSuccess) {
SaveEnvironment();
}
}
void Name() {
char name[81];
cgiFormStringNoNewlines("name", name, 81);
fprintf(cgiOut, "Name: ");
cgiHtmlEscape(name);
fprintf(cgiOut, "<BR>\n");
}
void Address() {
char address[241];
cgiFormString("address", address, 241);
fprintf(cgiOut, "Address: <PRE>\n");
cgiHtmlEscape(address);
fprintf(cgiOut, "</PRE>\n");
}
void Hungry() {
if (cgiFormCheckboxSingle("hungry") == cgiFormSuccess) {
fprintf(cgiOut, "I'm Hungry!<BR>\n");
} else {
fprintf(cgiOut, "I'm Not Hungry!<BR>\n");
}
}
void Temperature() {
double temperature;
cgiFormDoubleBounded("temperature", &temperature, 80.0, 120.0, 98.6);
fprintf(cgiOut, "My temperature is %f.<BR>\n", temperature);
}
void Frogs() {
int frogsEaten;
cgiFormInteger("frogs", &frogsEaten, 0);
fprintf(cgiOut, "I have eaten %d frogs.<BR>\n", frogsEaten);
}
char *colors[] = {
"Red",
"Green",
"Blue"
};
void Color() {
int colorChoice;
cgiFormSelectSingle("colors", colors, 3, &colorChoice, 0);
fprintf(cgiOut, "I am: %s<BR>\n", colors[colorChoice]);
}
char *flavors[] = {
"pistachio",
"walnut",
"creme"
};
void Flavors() {
int flavorChoices[3];
int i;
int result;
int invalid;
result = cgiFormSelectMultiple("flavors", flavors, 3,
flavorChoices, &invalid);
if (result == cgiFormNotFound) {
fprintf(cgiOut, "I hate ice cream.<p>\n");
} else {
fprintf(cgiOut, "My favorite ice cream flavors are:\n");
fprintf(cgiOut, "<ul>\n");
for (i=0; (i < 3); i++) {
if (flavorChoices) {
fprintf(cgiOut, "<li>%s\n", flavors);
}
}
fprintf(cgiOut, "</ul>\n");
}
}
char *ages[] = {
"1",
"2",
"3",
"4"
};
void RadioButtons() {
int ageChoice;
char ageText[10];
/* Approach #1: check for one of several valid responses.
Good if there are a short list of possible button values and
you wish to enumerate them. */
cgiFormRadio("age", ages, 4, &ageChoice, 0);
fprintf(cgiOut, "Age of Truck: %s (method #1)<BR>\n",
ages[ageChoice]);
/* Approach #2: just get the string. Good
if the information is not critical or if you wish
to verify it in some other way. Note that if
the information is numeric, cgiFormInteger,
cgiFormDouble, and related functions may be
used instead of cgiFormString. */
cgiFormString("age", ageText, 10);
fprintf(cgiOut, "Age of Truck: %s (method #2)<BR>\n", ageText);
}
char *votes[] = {
"A",
"B",
"C",
"D"
};
void NonExButtons() {
int voteChoices[4];
int i;
int result;
int invalid;
char **responses;
/* Method #1: check for valid votes. This is a good idea,
since votes for nonexistent candidates should probably
be discounted... */
fprintf(cgiOut, "Votes (method 1):<BR>\n");
result = cgiFormCheckboxMultiple("vote", votes, 4,
voteChoices, &invalid);
if (result == cgiFormNotFound) {
fprintf(cgiOut, "I hate them all!<p>\n");
} else {
fprintf(cgiOut, "My preferred candidates are:\n");
fprintf(cgiOut, "<ul>\n");
for (i=0; (i < 4); i++) {
if (voteChoices) {
fprintf(cgiOut, "<li>%s\n", votes);
}
}
fprintf(cgiOut, "</ul>\n");
}
/* Method #2: get all the names voted for and trust them.
This is good if the form will change more often
than the code and invented responses are not a danger
or can be checked in some other way. */
fprintf(cgiOut, "Votes (method 2):<BR>\n");
result = cgiFormStringMultiple("vote", &responses);
if (result == cgiFormNotFound) {
fprintf(cgiOut, "I hate them all!<p>\n");
} else {
int i = 0;
fprintf(cgiOut, "My preferred candidates are:\n");
fprintf(cgiOut, "<ul>\n");
while (responses) {
fprintf(cgiOut, "<li>%s\n", responses);
i++;
}
fprintf(cgiOut, "</ul>\n");
}
/* We must be sure to free the string array or a memory
leak will occur. Simply calling free() would free
the array but not the individual strings. The
function cgiStringArrayFree() does the job completely. */
cgiStringArrayFree(responses);
}
void Entries()
{
char **array, **arrayStep;
fprintf(cgiOut, "List of All Submitted Form Field Names:<p>\n");
if (cgiFormEntries(&array) != cgiFormSuccess) {
return;
}
arrayStep = array;
fprintf(cgiOut, "<ul>\n");
while (*arrayStep) {
fprintf(cgiOut, "<li>");
cgiHtmlEscape(*arrayStep);
fprintf(cgiOut, "\n");
arrayStep++;
}
fprintf(cgiOut, "</ul>\n");
cgiStringArrayFree(array);
}
void Cookies()
{
char **array, **arrayStep;
char cname[1024], cvalue[1024];
fprintf(cgiOut, "Cookies Submitted On This Call, With Values (Many Browsers NEVER Submit Cookies):<p>\n");
if (cgiCookies(&array) != cgiFormSuccess) {
return;
}
arrayStep = array;
fprintf(cgiOut, "<table border=1>\n");
fprintf(cgiOut, "<tr><th>Cookie<th>Value</tr>\n");
while (*arrayStep) {
char value[1024];
fprintf(cgiOut, "<tr>");
fprintf(cgiOut, "<td>");
cgiHtmlEscape(*arrayStep);
fprintf(cgiOut, "<td>");
cgiCookieString(*arrayStep, value, sizeof(value));
cgiHtmlEscape(value);
fprintf(cgiOut, "\n");
arrayStep++;
}
fprintf(cgiOut, "</table>\n");
cgiFormString("cname", cname, sizeof(cname));
cgiFormString("cvalue", cvalue, sizeof(cvalue));
if (strlen(cname)) {
fprintf(cgiOut, "New Cookie Set On This Call:<p>\n");
fprintf(cgiOut, "Name: ");
cgiHtmlEscape(cname);
fprintf(cgiOut, "Value: ");
cgiHtmlEscape(cvalue);
fprintf(cgiOut, "<p>\n");
fprintf(cgiOut, "If your browser accepts cookies (many do not), this new cookie should appear in the above list the next time the form is submitted.<p>\n");
}
cgiStringArrayFree(array);
}
void File()
{
cgiFilePtr file;
char name[1024];
char contentType[1024];
char buffer[1024];
int size;
int got;
if (cgiFormFileName("file", name, sizeof(name)) != cgiFormSuccess) {
printf("<p>No file was uploaded.<p>\n");
return;
}
fprintf(cgiOut, "The filename submitted was: ");
cgiHtmlEscape(name);
fprintf(cgiOut, "<p>\n");
cgiFormFileSize("file", &size);
fprintf(cgiOut, "The file size was: %d bytes<p>\n", size);
cgiFormFileContentType("file", contentType, sizeof(contentType));
fprintf(cgiOut, "The alleged content type of the file was: ");
cgiHtmlEscape(contentType);
fprintf(cgiOut, "<p>\n");
fprintf(cgiOut, "Of course, this is only the claim the browser made when uploading the file. Much like the filename, it cannot be trusted.<p>\n");
fprintf(cgiOut, "The file's contents are shown here:<p>\n");
if (cgiFormFileOpen("file", &file) != cgiFormSuccess) {
fprintf(cgiOut, "Could not open the file.<p>\n");
return;
}
fprintf(cgiOut, "<pre>\n");
while (cgiFormFileRead(file, buffer, sizeof(buffer), &got) ==
cgiFormSuccess)
{
cgiHtmlEscapeData(buffer, got);
}
fprintf(cgiOut, "</pre>\n");
cgiFormFileClose(file);
}
void ShowForm()
{
fprintf(cgiOut, "<!-- 2.0: multipart/form-data is required for file uploads. -->");
fprintf(cgiOut, "<form method=\"POST\" enctype=\"multipart/form-data\" ");
fprintf(cgiOut, " action=\"");
cgiValueEscape(cgiScriptName);
fprintf(cgiOut, "\">\n");
fprintf(cgiOut, "<p>\n");
fprintf(cgiOut, "Text Field containing Plaintext\n");
fprintf(cgiOut, "<p>\n");
fprintf(cgiOut, "<input type=\"text\" name=\"name\">Your Name\n");
fprintf(cgiOut, "<p>\n");
fprintf(cgiOut, "Multiple-Line Text Field\n");
fprintf(cgiOut, "<p>\n");
fprintf(cgiOut, "<textarea NAME=\"address\" ROWS=4 COLS=40>\n");
fprintf(cgiOut, "Default contents go here. \n");
fprintf(cgiOut, "</textarea>\n");
fprintf(cgiOut, "<p>\n");
fprintf(cgiOut, "Checkbox\n");
fprintf(cgiOut, "<p>\n");
fprintf(cgiOut, "<input type=\"checkbox\" name=\"hungry\" checked>Hungry\n");
fprintf(cgiOut, "<p>\n");
fprintf(cgiOut, "Text Field containing a Numeric Value\n");
fprintf(cgiOut, "<p>\n");
fprintf(cgiOut, "<input type=\"text\" name=\"temperature\" value=\"98.6\">\n");
fprintf(cgiOut, "Blood Temperature (80.0-120.0)\n");
fprintf(cgiOut, "<p>\n");
fprintf(cgiOut, "Text Field containing an Integer Value\n");
fprintf(cgiOut, "<p>\n");
fprintf(cgiOut, "<input type=\"text\" name=\"frogs\" value=\"1\">\n");
fprintf(cgiOut, "Frogs Eaten\n");
fprintf(cgiOut, "<p>\n");
fprintf(cgiOut, "Single-SELECT\n");
fprintf(cgiOut, "<br>\n");
fprintf(cgiOut, "<select name=\"colors\">\n");
fprintf(cgiOut, "<option value=\"Red\">Red\n");
fprintf(cgiOut, "<option value=\"Green\">Green\n");
fprintf(cgiOut, "<option value=\"Blue\">Blue\n");
fprintf(cgiOut, "</select>\n");
fprintf(cgiOut, "<br>\n");
fprintf(cgiOut, "Multiple-SELECT\n");
fprintf(cgiOut, "<br>\n");
fprintf(cgiOut, "<select name=\"flavors\" multiple>\n");
fprintf(cgiOut, "<option value=\"pistachio\">Pistachio\n");
fprintf(cgiOut, "<option value=\"walnut\">Walnut\n");
fprintf(cgiOut, "<option value=\"creme\">Creme\n");
fprintf(cgiOut, "</select>\n");
fprintf(cgiOut, "<p>Exclusive Radio Button Group: Age of Truck in Years\n");
fprintf(cgiOut, "<input type=\"radio\" name=\"age\" value=\"1\">1\n");
fprintf(cgiOut, "<input type=\"radio\" name=\"age\" value=\"2\">2\n");
fprintf(cgiOut, "<input type=\"radio\" name=\"age\" value=\"3\" checked>3\n");
fprintf(cgiOut, "<input type=\"radio\" name=\"age\" value=\"4\">4\n");
fprintf(cgiOut, "<p>Nonexclusive Checkbox Group: Voting for Zero through Four Candidates\n");
fprintf(cgiOut, "<input type=\"checkbox\" name=\"vote\" value=\"A\">A\n");
fprintf(cgiOut, "<input type=\"checkbox\" name=\"vote\" value=\"B\">B\n");
fprintf(cgiOut, "<input type=\"checkbox\" name=\"vote\" value=\"C\">C\n");
fprintf(cgiOut, "<input type=\"checkbox\" name=\"vote\" value=\"D\">D\n");
fprintf(cgiOut, "<p>File Upload:\n");
fprintf(cgiOut, "<input type=\"file\" name=\"file\" value=\"\"> (Select A Local File)\n");
fprintf(cgiOut, "<p>\n");
fprintf(cgiOut, "<p>Set a Cookie<p>\n");
fprintf(cgiOut, "<input name=\"cname\" value=\"\"> Cookie Name\n");
fprintf(cgiOut, "<input name=\"cvalue\" value=\"\"> Cookie Value<p>\n");
fprintf(cgiOut, "<input type=\"submit\" name=\"testcgic\" value=\"Submit Request\">\n");
fprintf(cgiOut, "<input type=\"reset\" value=\"Reset Request\">\n");
fprintf(cgiOut, "<p>Save the CGI Environment<p>\n");
fprintf(cgiOut, "Pressing this button will submit the form, then save the CGI environment so that it can be replayed later by calling cgiReadEnvironment (in a debugger, for instance).<p>\n");
fprintf(cgiOut, "<input type=\"submit\" name=\"saveenvironment\" value=\"Save Environment\">\n");
fprintf(cgiOut, "</form>\n");
}
void CookieSet()
{
char cname[1024];
char cvalue[1024];
/* Must set cookies BEFORE calling cgiHeaderContentType */
cgiFormString("cname", cname, sizeof(cname));
cgiFormString("cvalue", cvalue, sizeof(cvalue));
if (strlen(cname)) {
/* Cookie lives for one day (or until browser chooses
to get rid of it, which may be immediately),
and applies only to this script on this site. */
cgiHeaderCookieSetString(cname, cvalue,
86400, cgiScriptName, SERVER_NAME);
}
}
void LoadEnvironment()
{
if (cgiReadEnvironment(SAVED_ENVIRONMENT) !=
cgiEnvironmentSuccess)
{
cgiHeaderContentType("text/html");
fprintf(cgiOut, "<head>Error</head>\n");
fprintf(cgiOut, "<body><h1>Error</h1>\n");
fprintf(cgiOut, "cgiReadEnvironment failed. Most "
"likely you have not saved an environment "
"yet.\n");
exit(0);
}
/* OK, return now and show the results of the saved environment */
}
void SaveEnvironment()
{
if (cgiWriteEnvironment(SAVED_ENVIRONMENT) !=
cgiEnvironmentSuccess)
{
fprintf(cgiOut, "<p>cgiWriteEnvironment failed. Most "
"likely %s is not a valid path or is not "
"writable by the user that the CGI program "
"is running as.<p>\n", SAVED_ENVIRONMENT);
} else {
fprintf(cgiOut, "<p>Environment saved. Click this button "
"to restore it, playing back exactly the same "
"scenario: "
"<form method=POST action=\"");
cgiValueEscape(cgiScriptName);
fprintf(cgiOut, "\">"
"<input type=\"submit\" "
"value=\"Load Environment\" "
"name=\"loadenvironment\"></form><p>\n");
}
}
[ 本帖最后由 fuer 于 2006-7-22 13:02 编辑 ] |
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发表于 2006-07-18 12:51
发表于 2006-07-18 13:10
