Question

我制定计划,从QT的一个地点下载一个档案,但由于QT图书馆没有工作,我决定使用CURL。根据有关网站文件部分的实例之一,我提出了以下守则:

下载者。

#ifndef DOWNLOADER_H
#define DOWNLOADER_H

// Curl includes
#include "curl/curl.h"
#include "curl/types.h"
#include "curl/easy.h"

#include <QString>
#include <QObject>

class Downloader : QObject
{
    Q_OBJECT

public:
    Downloader();
    void DownloadFile(QString url, QString directory);

signals:
    void DownloadProgress(int downloaded, int total, QString message);
    void DownloadComplete();

private:
    void downProg(double t, double d, double ultotal, double ulnow);
    void read(void *ptr, size_t size, size_t nmemb, FILE *stream);
    void write(void *ptr, size_t size, size_t nmemb, FILE *stream);
};

#endif // DOWNLOADER_H

下载者。

#include "下载者。"

// Curl includes
#include <curl/curl.h>
#include <curl/types.h>
#include <curl/easy.h>

Downloader::Downloader()
{

}

void Downloader::DownloadFile(QString url, QString directory) {
    CURL *curl;
    CURLcode res;
    FILE *outFile;
    //gchar *url = ptr;
    QString outFileName = directory + "/tempDL/minecraft.jar";

    curl = curl_easy_init();
    if (curl) {
        outFile = fopen(outFileName.toLocal8Bit().data(), "w");

        char *urlC = url.toLocal8Bit().data();
        curl_easy_setopt(curl, CURLOPT_URL, urlC);
    }
}

void Downloader::downProg(double t, double d, double ultotal, double ulnow) {

}

void Downloader::read(void *ptr, size_t size, size_t nmemb, FILE *stream) {

}

void Downloader::write(void *ptr, size_t size, size_t nmemb, FILE *stream) {

}

甚至在建筑前,QT 造物人告诉我,当我上下线时:curl_easy_setopt(curl, CURLOPT_URL, urlC);。 www.un.org/Depts/DGACM/index_french.htm

然后,在汇编该方案时,我收到<代码>。 Id 退回1份出境状况

在 little了一点之后,我怀疑这可能是某种定义性发言,但我无法在将他们从我的班子中除去后找到解决办法。

And this is my last resort for a file downloader, so I really need to make this work.

<><>Edit>:

在审查了汇编材料后,我发现如下。我认为这可能有助于:

WARNING: Failure to find: Fetcher/http_fetcher.h

WARNING: Failure to find: Fetcher/http_error_codes.h

WARNING: Failure to find: Fetcher/http_fetcher.h

WARNING: Failure to find: Fetcher/http_error_codes.h

而且,在评论了有问题的法典范围后,发现2号错误似乎是由于这一法典线造成的:

curl = curl_easy_init();

<>Update:

After fooling around with this for days, it has done nothing but frustrate me. I ve decided to just try and get the default QT functions to work again instead of fooling with getting this to work. Thanks for your help.

Answer 1

Probably the best way to diagnose this issue is to do a preprocess-only compilation. I assume you re using G++ so you should try the -E switch and output to a file. Then take a look at the file to see what the curl_easy_setopt line looks like.

UPDATE: For QT creator you could save off the temporary files created during compilation by updating your .pro file to include this option:

QMAKE_CXXFLAGS += -save-temps

http://gcc.gnu.org/onlinedocs/gcc/Debugging-Options.html 海湾合作委员会:

Store the usual “temporary” intermediate files permanently; place them in the current directory and name them based on the source file. Thus, compiling foo.c with `-c -save-temps would produce files foo.i and foo.s, as well as foo.o. This creates a preprocessed foo.i output file even though the compiler now normally uses an integrated preprocessor.

Answer 2

<<>code>___ 类型是海湾合作委员会汇编者的延伸,由CLURL使用。这意味着,海合会将编纂《欧洲空间法中心法典》,但其他C++级单位(如Qt造物公司)将在《欧洲空间法中心法典》上cho。签署,但并非关键。

第二次失败“共2:我返回了1个离职状态”,其中不包括一个原因;你应全面引用。我期望的是,你会想与卢爱阵图书馆连接,但这只是一位受过教育的学者。

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